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- RF Data Rate: 250 kbps
- Frequency: 2.4Ghz
- Power: 60mW
- Range: 100m indoor, 1.6km outdoor
- Supply Voltage: 2.8 - 3.4VDC
- Retrieved from: https://www.digi.com/pdf/ds_xbeemultipointmodules.pdf
- Datasheet: https://cdn-shop.adafruit.com/datasheets/Xbee+series+1+DS.pdf or XbeeSeries1Datasheet.pdf
Antennas:
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- Gain: 2dBi
- RPSMA female connector
- Link: https://www.parallax.com/product/32410
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During development, its ok to use the 2.4Ghz xbee. During flight tests its extremely important to use the S3B 900Mhz modules, as the 2.4Ghz will interfere with the DJI light bridge connection. In addition the 900Mhz modules provide a longer range (should be at least 10km). |
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The Xbee documentation is pretty long, however if you're just trying to understand the communication structure, the following two datasheets should provide most of the information you'll need. The first file describes the AT commands the module uses. The AT commands are used to configure each module, and it is what software like XCTU uses. The second file describes the API packet structure that the PicPilot sends to the Xbee's for various functionalities (like sending a TX packet, getting RSSI, etc).
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Transmit Operations
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After downloading the software, the module you're configuring needs to be plugged in to an Xbee mini-USB adapter. You cannot use the Xbee breakout used for the Picpilot to configure the modules from your PC, unless you configure remote AT commands, which it too complicated to describe.
An example configuration file for the below settings is found here:
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Connection Settings
All of the modules should be configured to connect via UART at 115200 baud/s, 8N1 (1 stop bit, no parity). If this doesn't work initially, try re-plugging in the usb adapter from your PC. Note that by default the modules come pre-configured to connect at 9600baud/s, so if the Xbee was just bought, use that.
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