Sigfox Doorbell Posting Message on Slack
by luisomoreau in Circuits > Arduino
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Sigfox Doorbell Posting Message on Slack
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It all came from a challenge made by Nicolas Lesconnec on Twitter to add Sigfox connectivity to Konstantin Dimitrov's great project: Arduino Capacitive Sensor In less Than 2 Minutes.
So, I decided to give it a go!
But it is useless to just add connectivity to a project. Hopefully (or not) our door broke yesterday on the 4th floor, thus, I decided to make a doorbell that posts a message on Slack.
The base of the project is the same than the Arduino Capacitive Sensor In Less Than 2 Minutes, I just changed from an Arduino to an Akeru board, which has the same Atmega processor but has the Sigfox module included.
Hardware
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You just need:
1 x Akeru board
1 x 1M resistor
1 x Coin (or any conductive material)
1 x LED
4 x Jumpers
1 x Cardboard box (I used a Sparkfun Kit's box)
Just plug the 1M resistor between the D2 and D8 pins
Arduino Code
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First, you need to download the following library and import them under the Arduino's library repository:
Now create a new sketch and copy/past or clone the code:
https://github.com/luisomoreau/sigfox_doorbell
#include <Akeru.h> #include <CapacitiveSensor.h> // TD1208 Sigfox module IO definition /* Snootlab device | TX | RX Akeru | D4 | D5 Akene | D5 | D4 Breakout | your pick */ #define TX 4 #define RX 5 // Sigfox instance management Akeru akeru(RX, TX); //Capacitive sensor CapacitiveSensor cs = CapacitiveSensor(2,8); // 1M resistor between pins 2 & 8, pin 8 is sensor pin, add a wire and or foil //Global variable bool flag = true; void setup() { cs.set_CS_AutocaL_Millis(0xFFFFFFFF);// turn off autocalibrate on channel 1 - just as an example //Serial.begin(9600); pinMode(7,OUTPUT); //Serial.println("Starting..."); if (!akeru.begin()) { //Serial.println("TD1208 KO"); while(1); }else{ //Serial.println("Ready!!"); } } void loop() { long sensor = cs.capacitiveSensor(50); //Serial.println(sensor1); // print sensor output if(sensor >= 1000) { digitalWrite(7,HIGH); if(flag){ sendMessage(); } } else{ digitalWrite(7,LOW); } } void sendMessage(){ flag = false; //Serial.println("Sending..."); if (akeru.sendPayload("01")) { //Serial.println("Message sent !"); } delay(1000); flag = true; }
You can try to run the code, every time the coin is touched, it will trigger a Sigfox message.
Be careful to the duty cycle limit. This depends on your region's regulation.
Learn more on http://makers.sigfox.com/
Connect Sigfox and Slack
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Activate your device
If you don't know how to activate your device, I wrote a small tutorial few month ago on http://blog.sigfox.com/activate-dev-kits/
Create a Slack WebHook
In order to post your message on slack, go to your slack's team and create a new incoming WebHook:
https://[your-team].slack.com/apps or search for Incoming WebHook
Click on "Create a new configuration"
Follow the form and copy the given webhook link
Create a Sigfox custom callback
Now go to your device type in Sigfox Backend (https://backend.sigfox.com) and click on Callbacks.
Click on "New"
Past the incoming webhook and add your JSON:
{ "text": "Hey!! Someone is stuck at the door... could anyone open the 4th floor door? thank you :)" }
Now every time a sigfox message is sent, a message will be post by your Slack bot.
Challenge Accepted
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I would be glad to answer your question.
Thank you for your attention.