Today the binaries for the NAMF-47rc2 version (of course – in the beta update channel) hit the server. It brings quite significant new features. The first, which will be appreciated especially by those who have recuperation in their homes.
If you equip your NAM with the SDS011 restarter, then in the SDS configuration you can set the alarm to go off at a preset PM2.5 or PM10 value.
Then pin 7 (the one closest to the LED and SDS connector) will be set to high (3.3V) when alert value has been exceed. Remember that PCF used in restarter can drive only 400 µA in high state, so You need to use some transistor to drive any load.
If you have mechanical ventilation in the house, you can thus receive information about the need to turn it off when the air is of poor quality. Output this signal to the outside (don’t forget to also “take” GND from the EXT connector or any of the HX connectors) and you can control the device.
You can achieve a similar solution using home automation (whether Home Assistant or Domoticz), there are also ready-made commercial solutions. Here the advantage is simplicity – if you don’t have HA/Domoticz this will also work. Since it works locally, it doesn’t require access to the cloud as some of the solutions you’ll encounter from competitors have.
LoRaWAN
The NAM 0.4 kit, expected by some for a long time, has finally appeared – based on ESP32 and running on LoRaWAN. The kit is still in beta, but if anyone is strongly interested in testing – you are welcome. The NAMF-47rc2 version already allows you to use LoRaWAN – you just need to be in range of The Things Network. The other good news about TTN is that besides being in range you don’t need additional infrastructure – Tomek Rękawek, the author of aqi.eco has added an integration that allows you to send data from TTN to aqi.eco! But about the details, I will write on the Starter Kit, describing the configuration. For now, soldering instructions for the NAM 0.4 kit are available.
DNMS – measure noise
The next big news is support for DNMS! Digital Noise Measurement Sensor is, as the name suggests, a sensor that measures noise intensity. Well, and since version 47rc2 it is already supported by NAM.
To top it off – any day now a soldering kit will be on sale in our shop, which will allow you to build such a sensor
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