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jDrones connector specifications

Telemetry Port

This pinout should be used for any serial port. Ports not supporting hardware flow control should leave the CTS and RTS lines floating. Cables should be 1:1 to the periphal and TX / RX as well as CTS / RTS should be crossed on the peripheral side (e.g. a radio modem would have its RX port on pin 2, TX port on pin 3, RTS on port 4 and CTS on port 5).

Pin Signal Volt
1 (red) VCC +5V
2 (blk) TX (OUT) +3.3V
3 (blk) RX (IN) +3.3V
4 (blk) CTS (IN) +3.3V
5 (blk) RTS (OUT) +3.3V
6 (blk) GND GND

GPS port

This port is intended for combined serial plus I2C GPS units.

Pin Signal Volt
1 (red) VCC +5V
2 (blk) TX (OUT) +3.3V
3 (blk) RX (IN) +3.3V
4 (blk) I2C1 SCL +3.3V
5 (blk) I2C1 SDA +3.3V
6 (blk) GND GND


Recommended CAN transceivers: TJA1051TK3/118 or LTC2875

Pin Signal Volt
1 (red) VCC +5V
2 (blk) CAN_H +5V
3 (blk) CAN_L +5V
4 (blk) GND GND

I2C port

Pin Signal Volt
1 (red) VCC +5V
2 (blk) I2C1 SCL +3.3V (1.5K pullup on autopilot)
3 (blk) I2C1 SDA +3.3V (1.5K pullup on autopilot)
4 (blk) GND GND

SPI port

This port is optional and for external SPI sensors.

Pin Signal Volt
1 (red) VCC +5V
2 (blk) SPI_EXT_SCK +3.3
3 (blk) SPI_EXT_MISO +3.3
4 (blk) SPI_EXT_MOSI +3.3
5 (blk) !SPI_SS1 +3.3
6 (blk) !SPI_SS2 +3.3
7 (blk) GND GND


The CURRENT signal should carry an analog voltage from 0-3.3V for 0-60A as default. For high-power units the range should be 0-3.3V for 0-120A. The VOLTAGE signal should carry an analog voltage from 0-3.3V for 0-50A as default.

The VCC lines have to offer at least 2.5A continuous and should default to 5.3V. A lower voltage of 5V is still acceptable, but discouraged.

Pin Signal Volt
1 (red) VCC +5.3V
2 (blk) VCC +5.3V
3 (blk) CURRENT +3.3V
4 (blk) VOLTAGE +3.3V
5 (blk) GND GND
6 (blk) GND GND

Dronecode Debug

To facilitate debug and service cables, Dronecode has developed several debug connectors, of which the Dronecode mini debug connector has entered active service. DCD-Mini


Dronecode debug port (JST SM06B connector). The indicated voltage is nominal 3.3V, but for a target running at a lower voltage (e.g. 1.8V) the debug probe should shift its voltage to the target sense voltage. Up to 100 mA should be provided on TARGET PROCESSOR VOLTAGE so that debug adapters can drive their shifter / optocoupler directly from this line.

Pin Signal Volt
2 (blk) CONSOLE TX (OUT) +3.3V
3 (blk) CONSOLE RX (IN) +3.3V
4 (blk) SWDIO +3.3V
5 (blk) SWCLK +3.3V
6 (blk) GND GND

Solder pads on board next to connector:

Pad Signal Volt
1 NRST (reset) +3.3V
2 GPIO1 (free GPIO) +3.3V
3 GPIO2 (free GPIO) +3.3V
com/connectors.txt · Last modified: 2019/05/08 07:00 by metro