This sample is adapted from the zigbee_template from the nRF Connect SDK. It's a basic experimental/educational/exploratory firmware sample for b-parasite.
These clusters are defined in the sample:
| Cluster ID | Name |
|---|---|
| 0x0001 | Power Configuration |
| 0x0400 | Illuminance Measurement |
| 0x0402 | Temperature Measurement |
| 0x0405 | Relative Humidity Measurement |
| 0x0408 | Soil Moisture Measurement |
The sample will first boot and start looking for a Zigbee coordinator - in pairing mode. The onboard LED will be flashing once a second while in this mode. Once a suitable network is found, the LED will briefly flash 3 times and remain off.
A factory reset will make b-parasite forget its network pairing information and switch to pairing mode. There are two (mutually exclusive) methods to perform a factory reset, controlled by the CONFIG_PRST_ZB_FACTORY_RESET_METHOD config flag.
Resetting b-parasite twice in the timestamp of 5 seconds will perform a factory reset. With this method, both shorting the RST pin to ground and removing-inserting the battery counts as a reset.
For better results, wait > 1 and < 5 seconds second between the resets. The LED will flash a total of 8 times to indicate it worked.
In this method, there's a distinction between two reset modes.
The device enters this mode when it is powered. For example, swapping an old battery or connecting to eternal power. This is the "usual" reset mode, and joined networks will be remembered.
If the device's RESET pin is briefly grounded, the device will effectively be factory reset. The device will leave its previous network and start looking for a new one.
While it works, this method can be finicky - an accidental pin reset will perform an unwanted factory reset.
Available options in Kconfig. Notable options:
CONFIG_PRST_ZB_SLEEP_DURATION_SEC: amount of time (in seconds) the device sleeps between reading all sensors and updating its clustersCONFIG_PRST_ZB_PARENT_POLL_INTERVAL_SEC: amount of time (in seconds) the device waits between polling its parent for data
This firmware sample has only been tested with Home Assistant, using one of the following integrations.
With the ZHA Home Assistant integration, b-parasite should work out of the box.
With Zigbee2MQTT, a custom converter is required. The b-parasite.js file contains such a converter. See Support new devices for instructions.
While sleeping, the device consumes around 2 uA:
In the active cycle, it averages around 125 uA for 1 second:
