JeeNode Zero

JNZ revision 4

The LED is on PA8, “0” is on.

Design files: (Eagle v7): schematic (PDF) + board (PNG).

For other ways of creating ARM-based nodes with an RFM69, see these articles, which can be useful for testing RF communication to/from a JNZ:

Hooking up an RFM69 radio - Dec, 2016
Adding the RFM69 module - Apr, 2016

JNZ revision 3

This is the second iteration (revision 2 never made it to an actual PCB). It has footprints for 3 sensors on the top side: BME280 (temp/humi/pressure), VEML6040 (colour), and MAG3110 (3-axis magnetometer).

The LED is on PB5, “0” is on.

The RFM69 connections are: SSEL: PA15, SCLK: PB3, MISO: PA6, MOSI: PA7. DIO pin connections: DIO0: PB0, DIO1: PB1, DIO2: PB4.

Known issues:

The VEML6040 footprint is wrong, the sensor will short out VCC.

Design files: (Eagle v7): schematic (PDF) + board (PNG).

JNZ revision 1

This is the first PCB prototype of the JeeNode Zero. It has footprints on the top side for a BME280 sensor (temp/humi/pressure) and for a TSL4531X sensor (ambient light), as well as I2C pull-ups. It was initially populated with an STM32L051 µC, which is pin-compatible with the L052.

The LED is on PA15, “0” is on.

The RFM69 is on PA4..7, with DIO0: PA8, DIO1: PB1, DIO2: PB0.

Known issues:

RESET is tied directly to FTDI’s DTR, which means that a software reset will not work when a “stiff” output signal is present on the DTR pin.
There is no pull-down on BOOT0, causing the board to not always start up properly when no FTDI adapter is present.
The TPS78233 FB pin was left floating, it needs to be tied to ground.

Design files: (Eagle v7): schematic (PDF) + board (PNG).