We built a dairy!

For quite a while we weren’t sure if we should try and make our goat-and-cheese-farm dream come true by building a dairy on location or if we should try to rent a space in a commercial kitchen of some sort. The opportunity arose when Claire’s stepfather decided to bring a container with building materials from China for the house project he is working on, and let us have the container in return for storing the stuff in it on our farm for some time. We then decided that we should convert the 20 foot container to our very own farm dairy!

The container in place in front of one of our barns:

We poured concrete on the floor and made a drain:

Then we cut out holes for windows and doors, put up walls and a ceiling:

We poured more fine concrete as a final layer and had some “help” decorating:


Then we put up ceramic tiles on the walls, painted the ceiling:

In between there was a lot of work on things such as painting the floor with epoxi, connecting water and sewage, installing ventilation, and of course, putting a roof with a tilt on top of the container:


Finally it was time to move in all the equipment. This is Nils using our 300 l Rademaker cheese-making vat for the first time!

Claire in front of the cheese vat wearing signature hat and apron with our logo:

The whole project took us about 6 months from start to finish, while working with our day-jobs as well as taking care of the goats, etc. Did I mention we also delivered 27 goat babies..?

All in all, building our farm dairy was a really cool project which we are super proud of, and plan to put to good use as well as develop and expand during the years to come.

The farms of capital. Part I

The post-industrial crossroads

During the last century, the farm as a societal phenomenon, as well as economical factor, has transformed. A typical farm 100 years ago, would today be considered small scale or homestead. The activities on a farm 100 years ago could span over almost the entire agricultural field, including animal husbandry for several species, vegetable, crop and fodder cultivation, forestry, fishing and fruit foraging, as well as processing the staples into refined and conserved food. These value creating processes was distributed horizontally over several production chains, as well as vertically from raw material and staple production, to refined food and manufactured goods. An economically flexible model, since the cost of switching line of production when one was doing bad, mostly was service based as taken in the learning of a new skill, or hiring another specialist.  The modern industrialized farms are most often highly specialized on a few activities, chosen from an economical perspective. If there are grasslands, cow or sheep meat would be a good choice. If there are sedimentary soils, growing crops would be suitable. However, managing farms from an industrial perspective has proven risky, as not only the weather presents unforseeable risks, but also the global market, dependencies on logistics, dependencies on fertilizer and fuel prices and interests on the capital invested in the machine park. The solution to many of these problems has been to scale up and specialize even more, all inspired from other industrial areas. But as the same logistic network that is needed to transport your cattle to a distant meat packaging plant, also can transport meat from a place where it is cheaper to produce, the competition eventually becomes harder. A phenomenon that has greatly reduced the amount of small farms.

That’s all logical. This curve is to be found in all areas affected by industrialization, let be during different periods.The agricultural sector just tends to be a little slower than i.e. manufacturing and raw material sectors, that accomplished the same a few decades earlier.

However, the industrial age is long in the past now. The digital era, the age of information and knowledge, has introduced itself in area after area, leading to transformation of traditional methods, or extinction. Will the huge, specialized and economically vulnerable farms destroy each other ecologically and economically in the competition, and how will our food be produced then?

Pesticides being distributed on a field. Expensive and specialized machinery eradicating the biological environment, as well as the means of its own economical existence. Source: Modern Farmer/Wikimedia commons

Next part: The farms of capital. Part II

How much wood would the woodchuck chuck, if the woodchuck could chuck wood

One of the many new activities that farm life has brought us is taking in wood from our small but lovely forest. We have yet to optimize this process (having discussed alternatives such as using a horse to drag logs from the forest to the far, as well as buying a quad and bringing  in chopped wood after having chopped it in the forest).

For now, we are happy to view this labor as exercise with a purpose – keeping the house warm! There is a primal pleasure in sawing down a tree, sawing it into logs that are the right length for our furnace, chopping the logs into firewood, and then stacking the firewood in neat boxes that are sheltered from the rain. The actual chucking of that same firewood into the furnace takes place at least 6 months from when the tree was cut down – usually longer, the drier the wood is the better!

We primarily take down trees that have broken after a storm, as well as trees that are growing on the very edge of the lake and are sick from too much water. We have a variety of species – a lot of spruce but also more sturdy kinds of trees such as aspen and beech. An added bonus of taking down spruces is that the goats love eating the needles and peeling the bark off the branches, especially now in wintertime when fresh greens are scarce.

IMG_20151212_140122IMG_20170106_151506

IMG_20161128_174657

GoTo Goat – A GPS goat tracker

As goats are naturally born masters of escaping, we soon realized that the electric fence only should be considered as the first line of defense. Usually, the most clever ones finds their way out, and then calls for the others to follow, and generally, their just heading out to a nearby pasture, where the grass is allegedly greener, or home to the barn. On a few occasions though, they have been spooked by wild boars, and ran off into the forest. When I was tracking them out on a small dirt road, and a neighbor called from his forestry tractor, about 3 km out, and asked if maybe my goats where out hiking, I realized that we have a need for a tracking device. The idea of the GoTo Goat device was born, a GPS-module, transmitting coordinates over the cell network.

wp-1474494088463.jpg
The goats where very happy to see me, and followed me home through the forest.

 

 

Features:

Real-time GPS location

Upload coordinates to a cloud service, or your own server over GPRS

Solar powered

Android locator app

Component list

Microcontroller: Arduino nano 6 euro

GPRS module: SIM800L 5 euro

GPS module: Ublox NEO-6M 7 euro

Power supply: Linocell 3X Solar Powerbank 8000 mAh 50 euro

Step-down regulator: AMS1117 adjustable (5V-3.7V) 1 euro

Sim card (Telia) free

Total cost: 19 euro for the components and 50 for the powerbank, but i bought the powerbank locally in Sweden, and there are much cheaper ones around on ebay. With a little more labour put into sourcing, the cost could probably drop to about 30 euro.

The SIM800L

s-l225

This is a very nice little module. Essentially a complete cell phone, except for user interface, speaker and mic. It’s controlled from the arduino by sending AT commands through serial communication. The SIM800L is supposed to be powered by a 3.7V Li cell, as in a cellphone, and that’s why the buck converter is needed in this setup to bring the current down from 5V.

The only functionality used here is the GPRS device for sending over HTTP, but using SMS or DMTF for controlling the unit are possibilities as well as calling the goat for an occasional chat.

 

 

The NEO-6M

u6

 

 

A neat GPS-module supported by the arduino TinyGPS library. Pretty fast on getting a fix, and supplying coordinates once a second.

 

 

 

The Nano

$_1

I choose an Arduino nano for prototyping, since it has it’s own FTDI, a reasonable size and a friendly number of pins. If the size, power consumption and prize needs to be further tweaked, I can’t see any reason not to use a mini pro though. The SIM800L is rated for max 3.7V to 4.1V so the internal voltage regulators will be useless.

 The SIM

Any sim card that supports GPRS will work, but it’s recommended to use one that not expires too soon after charging. As very little traffic volumes are transmitted, it would be a shame if the card needed to be refueled every 3 months or so. Instead, if you can find one that works for several years, and only using the throttled speed when paid data is depleted, that would be completely sufficient.

 

Connections

SIM800L pin NEO-&M pin AMS1117 pin Arduino pin Powerbank
Net – antenna Usb Port2
Vcc Vout
Rst D5
TX D8
RX D7
Gnd Gnd Gnd Gnd Port1 –
Vcc 5V
Rx D4
Tx D3
Vin Port1 +
31583617682_a1031ba862_o
SIM800 and nano in the center, NEO-6M to the right. Here, the SIM800 is powered by a 3.7V battery

Cloud API

I choose thingspeak.com as cloud service to store the coordinates. Mostly because I already use it for other sensors, so I’m already familiar with the API. Virtually any online API would be suitable, as long as you can send in values through a HTTP GET parameter.

Thingspeak will let you send in 3 000 000 updates / year with their free account, so that will limit you to 5.7 updates / minute. I’ll go for max 1/min, probably less. Since you are putting the API key in the arduino code, you don’t want to use a service that is likely to go off the market, or become “premium only”, like Xively did. To be sure that the service stays alive, you could host your own thingspeak platform on a raspberry pi or similar.

Code

The NEO-6M is very simple to interface from the Arduino. I used the kitchensink example from the TinyGPS library, and trimmed it down to the bare necessities.

The SIM800L is more complicated to interface, since you need 2-way communication to ensure that the commands have been successfully performed. I found some example code at Cassiopeia that was very helpful. Even if I do not use DMTF functionality as in the example, their approach for communicating with the SIM800L is very convenient.

As both the NEO-6M, the SIM800L and the arduino IDE Serial monitor are using serial communication for interfacing the arduino, there will be issues regarding which ports to use. I kept the hardware serial (Serial) for debugging purposes, and let only the computer interface with it. For the modules, I assigned two SoftwareSerial ports, sim800 on pin 7 and 8 and ss on pin 3 and 4. To keep the communication channels separated, the arduino is instructed on which one to listen, depending on where input is expected.


#include <SoftwareSerial.h>
#include <TinyGPS++.h>
#include <avr/sleep.h>
#include <avr/wdt.h>
//Thingspeak channel
#define CHANNEL 199082 //Not used
//Thingspeak API write key
#define APIKEY "XXXXXXXXX"//Put your own write key here
//SIM800 TX is connected to Arduino D8
#define SIM800_TX_PIN 8
#define RATE 10000 //GPS sampling rate
//SIM800 RX is connected to Arduino D7
#define SIM800_RX_PIN 7
static const int RXPin = 3, TXPin = 4;
static const uint32_t GPSBaud = 9600;
const int sim_rst = 5;
int errors = 0;
//Create software serial object to communicate with SIM800
SoftwareSerial sim800(SIM800_TX_PIN,SIM800_RX_PIN);
SoftwareSerial ss(RXPin, TXPin);
TinyGPSPlus gps;
unsigned long last = 0UL;
// watchdog interrupt
ISR(WDT_vect)
{
wdt_disable(); // disable watchdog
}
void myWatchdogEnable(const byte interval)
{
MCUSR = 0; // reset various flags
WDTCSR |= 0b00011000; // see docs, set WDCE, WDE
WDTCSR = 0b01000000 | interval; // set WDIE, and appropriate delay

wdt_reset();
set_sleep_mode (SLEEP_MODE_PWR_DOWN);
sleep_mode(); // now goes to Sleep and waits for the interrupt
}
void setup() {
//Begin serial comunication with Arduino and Arduino IDE (Serial Monitor)
Serial.begin(9600);
while(!Serial);

//Beging serial communication with Arduino and SIM800
sim800.begin(9600);
delay(1000);
ss.begin(GPSBaud);
delay(1000);
Serial.println("Setup Complete!");
last = millis()-RATE;
}

void loop() {
errors = 0;
// Dispatch incoming characters from GPS
ss.listen();
while (ss.available() > 0)
gps.encode(ss.read());
if (millis() - last > RATE)
{
if (gps.location.isValid())
{
static const double OFFICE_LAT = 56.000, OFFICE_LON = 14.000; //Hard coded reference coordinates if needed in the future
double distanceToOffice =
TinyGPSPlus::distanceBetween(
gps.location.lat(),
gps.location.lng(),
OFFICE_LAT,
OFFICE_LON);
Serial.println(distanceToOffice);
double courseToOffice =
TinyGPSPlus::courseTo(
gps.location.lat(),
gps.location.lng(),
OFFICE_LAT,
OFFICE_LON);
char tmpCourse[10];
char tmpDistance[10];
char tmpLat[10];
char tmpLng[10];
char tmpSpeed[10];
char params[200];
int batteryLevel;
//Convert GPS data to strings
dtostrf(gps.location.lat(),1,6, tmpLat);
dtostrf(gps.location.lng(),1,6, tmpLng);
dtostrf(distanceToOffice/1000, 1,6, tmpDistance);
dtostrf(courseToOffice,1,6, tmpCourse);
dtostrf(gps.speed.kmph(), 1,6, tmpSpeed);
sim800.listen();//Turn to sim800l channel
disconnectGPRS();//Sometimes, the sim800l gets stuck with GPRS activated, and trying to activate it again will naturally fail.
while(!wakeUpSim800());
if(simOK()){
batteryLevel= getBatteryLevel();
Serial.print("Battery level: ");
Serial.println(batteryLevel);
sprintf(params, "apikey=%s&field1=%s&field2=%s&field3=%s&field6=%d", APIKEY, tmpLat, tmpLng, tmpSpeed, batteryLevel);
Serial.println(params);
//Next three stages are sequential. Error handling means that if the sequence is not completed with less than 5 unsuccessful tries on all stages, there is something wrong, and the sequence is aborted.
while(!initGPRS()&&errors++<5);

while(!initHTTP()&&errors++<5);

while(!putDataToThingspeak(params)&&errors++<5);
errors = 0;
while(!disconnectGPRS()&&errors++<5);
while(!powerDownSim800());
delay(200);
Serial.println("Entering watchdog sleep");
delay(100);
myWatchdogEnable (0b100001); // 8 seconds
myWatchdogEnable (0b100001); // 8 seconds
myWatchdogEnable (0b100001); // 8 seconds
myWatchdogEnable (0b100001); // 8 seconds
myWatchdogEnable (0b100001); // 8 seconds
myWatchdogEnable (0b100001); // 8 seconds
myWatchdogEnable (0b100001); // 8 seconds
myWatchdogEnable (0b100001); // 8 seconds

Serial.println("Resuming operations");
}
ss.listen(); //Turn back to GPS channel
}

if (gps.charsProcessed() < 10)
Serial.println(F("WARNING: No GPS data. Check wiring."));

last = millis();

}
}
boolean wakeUpSim800(){
Serial.println(F("Checking for sim800 module..."));

digitalWrite(sim_rst, LOW); // hardware reset after sleep RST
delay(300);
digitalWrite(sim_rst, HIGH);

// time to startup 3 sec
for (int i = 0; i < 6; i++) {
digitalWrite(13, HIGH); // green LED blink after RESET
delay(250);
digitalWrite(13, LOW);
delay(250);
}

sim800.println("AT"); // check if sim800 module responds
delay(100);
if (sim800.find("OK")) {
Serial.println(F("sim800 module awake"));
return true;
}
else{
Serial.println(F("sim800 module not found"));
return false;
}

}
boolean simOK() { // SIM CHECK OK
Serial.println(F("Checking for SIM card.. "));

sim800.println("AT"); // check if sim800 module responds
delay(100);
if (sim800.find("OK")) {
Serial.println(F("sim800 module found"));

delay(100); // wait for sim800 to settle a bit
sim800.println("AT+CFUN=1"); // operation
if (sim800.find("OK"))
Serial.println(F("Function level 1"));
else
return false;
delay(2000);
sim800.println("AT+CSMINS?"); // check if SIM card inserted
delay(100);
if (sim800.find("CSMINS: 0,0")) {
Serial.println(F("no SIM card found, stop here"));
return false;
}
Serial.println(F("SIM card found")); // continue if SIM card found

Serial.println(F("Allow some time for SIM to register on the network.."));
Serial.println();
delay(1000);
return true;
}
else{
Serial.println(F("sim800 module not found, stop here"));
return false;
}
}

void simReply() { // SIM REPLY
delay(500);
while (sim800.available()) {
char c = sim800.read();
if (c != '\n') Serial.write(c); // replace new line with space
else Serial.print(" ");
delay(5);
}
Serial.println();
}

boolean initGPRS(){
boolean noError = true;
sim800.println("AT+CIPSHUT"); //Ensure GPRS PDP is down before init
simReply();
//delay(1000);
sim800.println("AT+CGATT=1");//Attach to GPRS service
simReply();

sim800.println("AT+SAPBR=3,1,CONTYPE,GPRS");//Set(3) bearer connected(1) to Contype GPRS
if (sim800.find("ERROR"))
noError = false;
sim800.println("AT+CGATT=1");//Attach to GPRS service
if (sim800.find("ERROR"))
noError = false;
sim800.println("AT+SAPBR=3,1,APN,online.telia.se");//Set(3) bearer connected(1) to APN
if (sim800.find("ERROR"))
noError = false;
sim800.println("AT+SAPBR=1,1");//Open connected bearer
if (sim800.find("ERROR"))
noError = false;
Serial.print("initGPRS finished with no errors = ");
Serial.println(noError);
return noError;

}

boolean initHTTP(){
boolean noError = true;
sim800.println("AT+HTTPTERM");
if (sim800.find("ERROR"))
noError = false;
sim800.println("AT+HTTPINIT");
if (sim800.find("ERROR"))
noError = false;
sim800.println("AT+HTTPPARA=CID,1");
if (sim800.find("ERROR"))
noError = false;
Serial.print("initHTTP finished with no errors = ");
Serial.println(noError);
return noError;
}
boolean putDataToThingspeak(char params[200]){
boolean noError = true;
char req[250];
sprintf(req, "AT+HTTPPARA=URL,api.thingspeak.com/update?%s", params);
Serial.println(req);
sim800.println(req);
if (sim800.find("ERROR"))
noError = false;
delay(1000);
sim800.println("AT+HTTPACTION = 0");
if (sim800.find("ERROR"))
noError = false;
Serial.print("putDataToThingspeak finished with no errors = ");
Serial.println(noError);
return noError;
}

boolean disconnectGPRS(){
boolean noError = true;
sim800.println("AT+CIPSHUT");
if (sim800.find("ERROR"))
noError = false;
sim800.println("AT+SAPBR=0,1");
if (sim800.find("ERROR"))
noError = false;
sim800.println("AT+CGATT=0");
if (sim800.find("ERROR"))
noError = false;
sim800.println("AT+CFUN=0");
if (sim800.find("ERROR"))
noError = false;
Serial.print("disconnectGPRS finished with no errors = ");
Serial.println(noError);
return noError;

}
int getBatteryLevel(){
sim800.listen();
sim800.println("AT+CBC"); // battery level
delay(500);
String s = sim800.readStringUntil(',');//Grab the value between the commas
String level = sim800.readStringUntil(',');

return(level.toInt());
}

boolean powerDownSim800(){
boolean noError = true;
sim800.println("AT+CPOWD=1");
if (sim800.find("ERROR"))
noError = false;

Serial.print("SIM800l power down = ");
Serial.println(noError);
return noError;

}

 

Here are the latitude results from thingspeak, for more, go to the GoTo goat section on the IoT page.

Android app

The Android app is still just an embryo, but it will find a goat… You can find it on Play: https://play.google.com/apps/testing/com.framtidabruk.gotogoats

You need to enter your own thingspeak.com Api key and channel ID in the settings before it becomes useful.

3766840962902790605-account_id=1

Working 9 to 5

Since we both have “office jobs” it was a priority for us to get a good working space sorted. One of the smaller rooms downstairs seemed like a good option, and since it had a funky smell (hence giving the room the not-so-flattering name “kissrummet”/”the pee-room”)  as well as the floor being way crooked, it felt even more like the best place to start off the interior remodeling. We took out the greenish/brown plastic floor and uncovered some pretty old floorboards and isolating materials which we replaced and built up a little to make the floor more even. Finally we were able to put down a nice new oak floor! After that it was only the small matter of replacing the wallpapers, painting the ceiling, frames, window and radiator and putting up new lamps… We did not get around to finishing the room until October but we were mighty happy to be able to move in our desk!

This is what the room looked like before:


Work in progress… Raoul “helping” as usual!
29591753956_504fcd29ba_k

And this is what it looks like now:
wp-1480278826869.jpg

Getting into the closet

The walk-in closet adjacent to our bedroom was not initially a priority to renovate, but one day Claire got fed up with crawling around on the floor looking for a pair of socks in the cupboard she had been using to store clothes in since we moved here. “It will improve our quality of life!”, she exclaimed, and so the project began. We removed the old plastic carpet, took out the frames and steamed/scraped the old wallpapers off. Also, one of the walls needed to be replaced and the chimney-wall needed a good scraping/cleaning as well as a new coat of paint.IMG_20161030_212752The first idea that came to mind was a nice, red, carpet, so we built around that, adding a colorful wallpaper and golden frames as a final touch. Since the ceiling is quite low we were not able to install any of the standard wardrobe-systems found at IKEA, and in fact did not want to cover up too much of the nice walls. Instead, we found some regular cube-shaped shelves of the “Kallax”-model, as well as a curtain-rod for clothes on hangers.

This is what it looked like before:


   
..and the result – a luxurious little room, where the only regret is that there is not more time to be spent choosing clothes and hanging out in there:
  

Defcon #24 and small scale farming

What did this years version of the annual hacker convention in Las Vegas have to tell about small scale farming? Nothing directly, being that kind of  happening where the participants and speakers seem to thrive in cellars and abandoned mines, rather than the open air. Indirectly, a lot.


The theme this year was Human vs Machines, and of course, the internet of things was among the most frequent topics. It’s always amusing to watch hackers exploit old gadgets that their manufacturers given a prolonged product cycle by connecting them to the internet, and pranking the neighbours by exposing their porn surfing habits through a vulnerable online toaster mostly raise the question: why did that guy buy a connected toaster?

So why should the small scale farmer be concerned about IoT security (except for the earlier mentioned reason)? The first link in the food supply chain is about to get more complex, as the demand for both locally produced and refined food grows. The specialized farmers that sells crop, meat or milk to industrialized facilities will have a hard time competing with producers that controls the complete value chain, from hay to cheese and steak, and understand to add ethical, esthetical and cultural value to their products.

There are two ways for the small scale farmer to accomplish a substancial increase in value, either by focusing on cultural and estethical factors, and become artisans, or by focusing on efficiency and interamplifying (is that a word?) processes. It’s with the interamplifying processes the internet of things makes its entrance. Automation, surveillance and statistics might not add the cultural value of a handmade cheese from Grannies recipe, but it ensures high food quality, and uniform products even in small batches, and that will allow you to make a larger variety of products, without being an master artisan in every field.

So the sensors and relays that will help you make the best food on the market, will they work for you, or for anyone that comes by digitally? Their information can be a great asset, as they provide the customer with unique data about their meal, but if you expose the controls, you also expose the possibility to replicate or sabotage your products. That’s the downside of shifting knowledge from human to machine.

In the great battle between man and machine, the machines are definitely winning. Knowledge is power, and we keep rely on the knowledge we stuff into machines, while we stress our brains back to the stoneage in our efforts to keep up with them. It’s when we taste the delicious cheese that where made with their help and without our efforts, that we realize who the real winner is. Just keep your networks segmented.

Mölkky step-by-step

The finnish game Mölkky is fun to play, but Nils said “No way we are buying a bunch of numbered sticks. We’ll make our own!”

Step 1 – get wood. 

Step 2 – cut it into 12 pieces, plus an extra piece for throwing. 

Step 3 – cut the tips off of the 12 pieces, diagonally.

Step 4 – number the pieces and set up the game!

Step 6 – set it up again..!

Final step – playtime 😄

Diy wireless pH-meter

In cheese-making, the key to a tasty, and reproducable, cheese, is keeping track of the  exact pH and the temperature in the active culture. You can do this with manual tools, such as a kitchen thermometer and pH-strips, but the measurements will be crude, and depend on your constant presence. That leading to inconsistencies between batches,  and difficulties in tracking errors in the process.

Michel Lepage is cutting the curd. Photo taken at the craft cheese-making course we took at Eldrimner in 2014.
A digital pH-meter is expensive. You can find some from €100, but you wont get built-in temperature correction for less than €250, and wireless goes beyond €350. For continous readings and  the possibility to recalibrate your sensor yourself, instead of sending it to the manufacturer,  add a lot more… I havn’t yet found a device capable of tweeting its readings 😉

My diy pH-sensor is not exactly cheap either. It ticks in at about €150 in material costs. I’ve seen people look pensive when they see the casing, and subconsiously push it closer to the recycling, so a slightly pricier casing than the pet bottle might be an investment. Otherwise, the bill of materials looks like:

Sensor

  • Atlas pH meter kit $149 (EZO version)
  • Arduino mini pro 3.3v $1.90
  • NRF24L01 radio $1
  • DS18B20 waterproof temp sensor $1.63
  • Battery holder $3
  • 2xAA batteries
  • Cables

With todays exchange rates, it translates to around €150.
If you’re setting up a new sensor network, you need a radio gateway and a computer to run the controller software on too

  • Arduino nano $6
  • NRF24L01 radio $1
  • Cables
  • Old computer or raspberry pi $25-$50

      You can order everything from ebay or aliexpress through the Mysensors store, but the items listed there may not always be availible in singel packages. Anyway, you will need more of those radios.

      Shipping is usually free from China (who is paying that?), but the pH-kit comes from the US, so add a few euros for shipping and customs.

      Features:

      • Measures pH-level in fluids and semi-solid compounds.
      • Calculates the correct pH from the latest temperature reading.
      • Measures temperature
      • 30 seconds between samples.
      • Continous measuring, just leave the probe in the milk and watch the readings.
      • Wireless transfer of data to the raspberry pi based controller unit
      • Presents the readings as a datastream or in nice graphs in a web interface. Use your phone or tablet to monitor the process from anywhere.

          Prerequisites:

          Tools

          • FTDI USB programmer, to program the arduino  mini pro and perform calibration. If you use arduino nano instead, you can skip this, but the nano is more expensive and power consuming.
          • Soldering iron, lead, soldering paste.
          • Computer with arduino ide or codebender running.
          • Pliers, knives, screwdrivers and that kind of stuff.

          Skills

          • Basic soldering. The only soldering done in my prototype is on the on/off switch. For a sturdy and reliable device to use in a kitchen environment, I recommend soldering the connections rather than using Dupont cables.
          • Basic programming. You can clone my code from codebender and hope it will work out of the box, but since things changed quickly on the internets of things, you will probably need to change some code to adapt to new version etc. So some understanding of coding will be helpful.
          • Arduino/MCU experiences. I wouldn’t recommend to make this your first microcontroller or Mysensors project. Start out with a simple blinking light and then a temperature sensor to make sure you get the IDE and Mysensors API.
          • Raspberry pi/Linux experiences. You could use a Windows computer as controller and user interface server, but if you’re up to arduino hacking, you might as well use an embedded device right away.