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Changelog

Hardware

The different layouts are located in the PCB-Layouts directory. Each directory (should) contain a *_schematic.pdf file with the corresponding schematic.

MoleNet v7.1

  • Fixed the BUSY pin of the SX1262 from 45 - 39
  • New protection circuit with p-channel MOSFET (IRLML5203). The old one with 1N5819 is available, but unpopulated
  • Additional test scripts etc.

MoleNet v7.0

  • Inverter to the RX side added (BS170 mosfet)
  • Antenna area of ESP increased
  • Additional I2C pins added to the headers
  • Headers re-organized for optimized connection to external boards. Added several power and GND pins
  • Added 1N5819 protection diode to the input (reverse polarity)
  • Input voltage labels corrected
  • Lora module changed from RA-01H (SX1276 chip) to RA-01SH (SX1262 chip)

Known issues

  • Not yet

MoleNet v6.3

  • Changed the LoRa reset pin to GPIO15: This one keeps the state during reset and therefore, keeps the LoRa module in sleep mode
  • Add more logos at the back
  • Improved the labels on the PCB

Known issues

  • Not yet

MoleNet v6.2

  • Fixed the SDI-12 interface
  • Fixed some labels (reset button, BME enable pins)
  • Increase size of mounting holes from M2 to M3

Known issues

  • Reset pin of LoRa not working. Bugfix: Keep the jumper for reset on J5 empty

MoleNet v6.1

  • Fixed the broken LED
  • Add a QWIC connector for I2c-based devices
  • Add an on-board BME280 temperature, humidity, ambient pressure sensor
  • SD card power can be switched via a GPIO

MoleNet v6.0

Redesign based on ESP32-S3, first version:

  • The ESP supports MicroPython and Arduino
  • All major components can be disconnected
  • Direct ESP32 support for RTC
  • SDI-12 interface, SD-card reader, native USB-port

Known issues

  • Missing resistor on LED D7 (center)
  • SDI-12 interface not working

MoleNet v5.2.2

Change in USART interface, new HF connector

MoleNet v5.2

Add more jumpers for the LEDs

MoleNet v5.1

Minor improvements, add connections for jumpers to completely disconnect the transceiver module

MoleNet v5.0

Redesign with the STM32L073RZT6 and an on-board SD-card interface, well-optimized to low power applications.

MoleNet v3.0

A redesign now based on the ATMEGA1284P, using an on board analog battery monitor, an MCP7940M RTC, improved SDI-12 interface, power enable pins etc. This version offers more computing capabilities compared to the previous ones.

MoleNet v2.1

Minor improvements for the SDI-12 sensor interface

MoleNet v2.0

This version has additional GPIO (analog and digital) available. Further, the EEPROM access has been improved.

MoleNet v1.0

First version of MoleNet. This version is based on an ATMEGA328P-PU and is programmed using the Arduino IDE. Further, it has an RFM69VW radio transceiver, an EEPROM, an SDI-12 sensor interface and a connector for an external RV8523 RTC module.

Software

TODO