Because I could no get a stable WiFridge (see here, here and here for details on my first version of WiFridge) using RN-XV Wifly module, I decided to give a try to the new Adafruit CC3000 Wifi shield.
By the way, I made a mistake when I ordered the shield (although it is quite clear on Adafruit’s web site…) there are 2 versions :
- one with uFL connector and then needing an additionnal antenna and adapter wire
- one with built-in ceramic antenna
So unless you really need an external antenna, the ceramic antenna should be sufficient for most use…
Apart from Wifi module, hardware is quite similar :
- 2 waterproof DS18B20 temperature sensors
- 1 AM2302 sensor
- 3 3mm LEDs (green, yellow, red)
- 3 1kΩ resistor
- 1 10kΩ resistor
1 4.7Ω resistor(AM2302 does NOT need a pullup… it is built-in !)1 Arduino Wireless shield1 RN-XV Wifly module- Adafruit CC3000 Wifi shield
- a bunch of wires
Connections are quite straightforward :
- Led are connected to digital I/Os 3, 6 and 7 through 1kΩ resistors. They are used for operation status.
- Both DS18B20 are conected to port 8 (yellow wire) and make use of a 4.7kΩ pullup resistor
- AM2302 is conneted to port 9… no pullup required !
Code for arduino is here.
It has now been running for 1 day with no glitch… and it will hopefully continue !
