M4 Wireless Telemetry Options
Just like the AQ6, the M4 can be connected to a computer or smartfone/tablet via wireless BlueTooth or long range telemetry devices.
General info about AQ Telemetry Options
Since XBee, 3DR or similar telemetry modules are a bit overdozed on a NanoQuad you better use a small BlueTooth module like this one from Flyduino or Viacopter or any module that works from 3-5V:
You can remove the heat shrink and the pins to save some weight and solder the wires directly to the pads.
VCC and GND can be soldered to the M4 power input pads.
Rx of the BT connectors go to Tx on the expansion header J2-9 (UART1.TX, Pin 42) and Tx goes to J2-8 (UART1.RX, Pin 43). You can either solder them to the existing pads of the headers or use some pins to plug into the headers.
You can use such a simple plug and wire it for your external telemetry module. The M4v2 supplies 3.3V on the +V OUT
To save even more weight and space you can use other BT modules that come without the pins and voltage regulator.
But they will require a re-programming via AT commands since they come with a baud rate of 9600 (needs to be 115200).
Preparations for Programming via FTDI cable
Using AQ Live Telemetry
More info about AQ Telemetry Options