I have finally find a little bit of time to finish the build of my EasyIOT temp/humidity sensors, based on DHT22, each sensor send every 30 sec, a updated temperature and humidity value. Every sensor is based on arduino 3.3v@8mhz, plus LCD 2×8, DHT22 and ESP8266.
The pcb is very similar to wireless probe.
The idea of this project is to easy detect if the postman has put some letter’s in the box … or not. Problem, i live in a apartment, 3th floor, no communication link can be established between my apartment and the mailbox, Wifi networks are not available, ISM 433mhz, 2.4ghz link don’t work, GSM consumption is to high … but SigFox Akeru board work like a charm, amazing for only 25mw of output power with a lot of concrete and metal around…
Continuer la lecture de Postbox detector with SigFox Akeru board
This is, two files written to get data from SigFox backend, one to get message list, and other one to get the device type, it’s can be a good start for your application if you are not familiar with php and json, just edit the file, put your informations, and upload to your server. Data from backend are collected through curl and GET method, stored in a json file (be careful with security permissions) and decoded with json_decode function.
https://github.com/tonygir/SigFox/
Continuer la lecture de Getting started with the Sigfox API & php/json
Last week, I had the chance to attend the SigFox maker’s tour in Paris, it was very interesting to learn more about this amazing technology.
SIGFOX is the first and only company providing global cellular connectivity for the Internet of Things, fully dedicated to low-throughput communications. SIGFOX is re-inventing connectivity by radically lowering prices and energy consumption for connected devices.
After the event, everyone has got a Akeru Sigfox board with one year contract, (ready to send messages to the SigFox network), the board is available in snootlab website for 100€ and is compatible with Arduino,
I ‘m currently do some experimentation with this board, more infos soon.
The last and final design, the Teensy and GPS is directly powered from 3.7v li-on batt, 39g heights with IP4 box.
Original project: http://www.f4huy.fr/?p=39
Arduino code and pcb layout (ARES) available.
Load the sketch with CPU Speed 8Mhz under Arduino IDE, (i use v1.6.3 without any problems).
Autonomy test:
With a full batt charge, GPS locked, 5hz rate logging, 20 hours continues logging.
Continuer la lecture de Teensy GPS Logger redesigned in smaller version
