Tessel is a microcontroller that runs JavaScript.

1. microcontroller
that runs JavaScript
Ladislav Prskavec
@abtris
PragueJS October 2014

4. Module Port A
Module Port C
Module Port B Module Port D
GPIO

5. microUSB
wifi
CC3000
processor
ARM Cortex M3
RAM
32MB
Flash 32MB

6. reset button
wifi button
Power LED Status/debug LEDs

11. Blink
var tessel = require('tessel')
var led1 = tessel.led[0].output(1);
var led2 = tessel.led[1].output(0);
setInterval(function() {
console.log("I'm bliking!!!");
led1.toggle();
led2.toggle();
}, 1000);

12. Blink
DEMO

13. Climate
var tessel = require('tessel');
var climatelib = require('climate-si7020');
var climate = climatelib.use(tessel.port['D']);
climate.on('ready', function () {
console.log('Connected to si7005');
setImmediate(function loop () {
climate.readTemperature('c', function (err, temp) {
climate.readHumidity(function (err, humid) {
console.log('Degrees:', temp.toFixed(4) + 'C', 'Humidity:',
humid.toFixed(4) + '%RH');
setTimeout(loop, 300);
});
});
});
});
climate.on('error', function(err) {
console.log('error connecting module', err);
});

14. Climate
DEMO

15. Ambient
var tessel = require('tessel');
var ambientlib = require('ambient-attx4');
var ambient = ambientlib.use(tessel.port['B']);
ambient.on('ready', function () {
setInterval( function () {
ambient.getLightLevel( function(err, ldata) {
if (err) throw err;
ambient.getSoundLevel( function(err, sdata) {
if (err) throw err;
console.log("Light level:", ldata.toFixed(8), " ", "Sound Level:", sdata.toFixed(8));
});
})}, 500); // The readings will happen every .5 seconds unless the trigger is hit
ambient.setLightTrigger(0.5);
// Set a light level trigger
// The trigger is a float between 0 and 1
ambient.on('light-trigger', function(data) {
console.log("Our light trigger was hit:", data);
// Clear the trigger so it stops firing
ambient.clearLightTrigger();
// After 1.5 seconds reset light trigger
setTimeout(function () {
ambient.setLightTrigger(0.5);
},1500);
});
...

16. Ambient
DEMO

17. Web Server
DEMO

18. Web Server
DEMO

19. Questions?
Ladislav Prskavec
@abtris
ladislav@prskavec.net

20. Resources
• http://start.tessel.io/install
• https://tessel.io/docs/power
• https://projects.tessel.io/projects
• https://github.com/tessel/hardware/blob/master/design-files.md
• https://forums.tessel.io/
• https://github.com/tessel/ambient-attx4
• https://github.com/tessel/climate-si7020
• https://github.com/tessel/relay-mono
• https://github.com/johnnyman727/mqtt-climate
• https://github.com/johnnyman727/tessel-webserver-demo