APC220 radio
The apc200 radio can be used for a wireless serial connection.
Up to 1 km range (line of sight)
Air baudrate 2400 to 19200
Error correction info is automatically added so expect than 100 byte user data is transmitted as 200 bytes in air (overhead)
Simpl serial interface (TX and RX line with powersupply ttl level)
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The set pin is only used when reprogramming radio
The enable pin is normally not connected. Can be used to turn off the radio.
This apc220 interface and configuration library is based on a simple C class
It is based on use of SoftwareSerial so on a UNO the hardware serial port is available or other things.
On a cansat it could be like
hardware serial for logging data on sdcard
higher baudrate than for radio to log large amount of data
57600 which gives 5000 bytes to log pr second
software serial for telemetri back to your homebase
9600 baud or lower (lower for extending range)
a few hundred bytes pr second
Still beware of your databudgets. Dont use all CPU power and time for logging
If you have a MEGA there is 4 hardware serial ports. In that case you can modify library to just use a hardware serial port.
because …
Changing frequency on radio
The library provide a simple interface for reprogram the apc220
See examples
more to come
Jens
See links in menu at your left
I did write this file. As long as you retain this notice you can do whatever you want with this stuff on these pages.
If we meet some day, and you think this stuff is worth it, you can buy me a beer in return :-)
(C) JensD
credit for license this goes to the beer-ware creator
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