Small prototype of combination between trackuino and DRA818V,
“Trackuino is intended for use by licensed radio amateurs. By operating on the standard APRS frequency, the signal can be picked up by an Internet gateway and reported on aprs.fi, so anyone with an Internet connection can track the tracker”
The idea of this project was to build a trackuino board with small gps module, low power arduino pro mini (3.3v @8mhz), a VHF transceiver DRA818V, and power management integrated. Continue reading
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…
I was wondering if the DRA818U will be a good candidate to build a POCSAG dedicated receiver, sadly he doesn’t provide direct output for “raw” signal from the IC, RDA1846 so the signal seem to be distorted through a AOP, i didn’t find any schematic about the internal architecture of DRA818, except a picture.
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.