Hive measurement system V3 with nRF52840 / HX711 / LoRa / I2C / Audio ADC - kickstarter

With the Beep foundation we developed a (soon to be) open source PCB together with the low power and LoRa hardware specialists at Ideetron. The PCB has a lot of features that might interest you if you would like to have an affordable ultra low power bee hive measurement system.


The Beep PCB v3 has the following features:

  • Nordic nRF 52840 64 MHz ARM® Cortex™-M4 processor (with Bluetooth 5 and Zigbee on board)
  • LoRa RFM95 868 MHz (EU) add-on
  • I2C screw terminal (BME280 supported out of the box)
  • 1Wire screw terminal for multiple temperature sensors (1 to 5x DS18b20 supported out of the box)
  • HX711 weight amp on board with 7 port screw terminal (incl. shield to GND)
  • High quality audio ADC (92 dBA SNR) with Auto Gain Control (max 96 kHz sampling rate)
  • 3.5mm jack mic input 4 pins
  • Reed (magnet) switch to enable Bleutooth for configuration
  • Tilt switch for detecting movement and powering down if tilted 90 degrees
  • Buzzer for Bluetooth/Tilt/Reed switch interaction user feedback
  • 64 Mb Flash memory
  • Unique hardware key IC
  • Wireless LoRa configuration via Beep configuration app with Bluetooth
  • Firmware updates over the air via Bluetooth
  • All screw terminal inputs protected
  • 4 mounting busses for 83x58x33mm standard waterproof plastic casing
  • Size: 75x50x23mm incl. components
  • Ultra low power 3V regulator, 4.5μA in sleep
  • Much more than a year of battery life when transmitting LoRa data each 15 minutes!

BTW: we will launch a Kickstarter campaign for the Beep measurement system v3 at the 9th of November 2019, in which you can also order this PCB as a separate pledge :slight_smile: Check for more info.

1 Like

Oh no, so many nice nice things but then you go and use a s**ty HopeRF module for LoRa.


11 posts were merged into an existing topic: Experiences with RFM9x and SX127x based SPI LoRa modules

Thanks for all RF module speculations, please move them to the topic where they belong.

With regard to our choice of LoRa RF module: All HopeRF modules are tested before leaving the factory, Ideetron already made a lot of products containing it and never had problems with them. Ultra low power in standby, and sending messages at all spreading factors. Also certification has already been done with these modules, so nothing to worry about. For the purpose of sending LoRa messages, they work perfectly in the context of this PCB. And if you would like another module, it is easily swappable.

Please discuss the proposed features of this super nice PCB here :slight_smile:


Will the firmware be open source?

Yes! :+1: