I wired up a 418 Mhz transmitter to a Picaxe 08M tonight. I can get the output of the PicAXE sent via wireless to a 418 Mhz receiver and see the output on the serial port. I bought the transmitter/receiver ages ago from Futurelec, but they didn’t include any documentation! I struggled for quite a while to get it to work and stopped in frustration. I was browsing the web and found a tutorial on the Sparkfun website that worked great! klp_walkthrough.pdf Next time I will buy from Sparkfun!
Now to try to send data to the PicAxe 08M wirelessly!
A couple of hours later, this is proving difficult. I can program the PicAXE wirelessly if I reset the power at the start of the programming cycle. While in transmit mode, there is lots of noise on the serial out line. A couple of ideas here:
- 418 MHz is now used by cellular phones so there may be external interference.
- The Picaxe maual has some promising leads.
To be continued!
So another evening of fighting with this thing.  I had very little luck transmitting to the PicAXE. Noise was so bad I instituted a checksum and had 80% of my packets rejected!!! I have ordered a 433 Mhz transmitter from Sparkfun.
[...] transmitter that sends the appropriate commands to the onboard processor. I previously was using a 418Mhz transmitter and was getting swamped with noise. I bought a 240C wireless USB camera. It arrived today. The [...]
Pingback by profmason.com » Wireless WebCam — May 21, 2007 @ 8:54 pm
[...] several previous attempts to make a serial wireless system, I finally have something that works. Previously I had used modules from Futurelec and Sparkfun. [...]
Pingback by profmason.com » XBEE wireless modules — October 22, 2007 @ 9:58 pm