MotionMote R3

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I would like to introduce the new MotionMote R3 revision. The kit will be mostly the same, with the exception that it supports some exciting new options. Read on for details.

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Here are the highlights of the new revision:

  • support for Panasonic ultra low power PIR sensors !
    While expensive, these sensors are really nice and compact. They are available in black/white and come in several variants, the lowest power being 1uA, 2uA and 6uA. Also there are long range (12m) and short range (5m). I tried both and for indoors both are working great
  • lower power overall – the circuit was optimized to reduce several uA of power usage regardless which PIR you use
  • support for soldering a BME280 temperature/humidity/pressure sensor (i2c pullups included on the PCB anyway) – this is experimental and the BME footprint will be unpopulated except for special orders
  • relocated the battery JST connector
  • replaced the power switch with a much more robust version
  • battery monitor now runs through a 1M+2M resistor network

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The part I like most is being able to run this revision board on less than 10uA when using a Panasonic 2uA PIR sensor (and the BME also). This setup includes a sleeping stock Moteino (6.5uA) and a 2uA PIR shown in the photo above, soldered to a R3 MotionMote. These are expensive PIR sensors but compare that to a much larger idle usage of around 60uA when using the cheap and bulky chinese HC-SR501 PIR sensor.

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This R3 revision still supports the 0.96″ OLEDs if you can find one. There’s a jumper pair on the back to allow swapping the VCC/GND on these since the pinouts are unpredictable but the default is VCC-GND-SCL-SDA.

Kits and documentation are being worked on and hopefully will be ready within a week or so. The kit included PIR sensor is still the HC-SR501. Depending on the response I may stock some Panasonic PIRs for those who would like to buy these.