Another interesting product in our Zigbee homebrew firmware experience, naturally, is MiaoMiaoCe's MHO-C401, and like virtually all MMC products, they exist in multiple versions, some of which use earlier ink screen technology, consume more power, and don't currently offer corresponding Zigbee support in Pvvx's firmware, which can support The one that does is known as the MHO-C401N.
This is an ink screen product, but not exactly a dot-matrix ink screen, but a special ink screen. It has relatively good contrast and an overall good feel.
We are likewise sharing some customised versions of Zigbee firmware that we have modified and tested for more than 24 hours, so feel free to join in exploring the interesting sensors of these homebrew firmwares.
The entire firmware is based on pvvx's ZigbeeTLC, they are pure and simple, optimised for batteries and leave behind the extra advertisement packages.
For those who are experienced, you can also try to buy the original sensors yourself and use the handy pvvx-provided page to try flashing the Zigbee way firmware on your own.
For us, the open source firmware, simplified and reliable, is fascinating.
Compared to the CGDK2-based THS-G2, there are some differences as follows:
- The THS-G3 uses an ink screen with very good contrast.
- The THS-G3 uses a CR2032 battery, which is a little smaller than the G2's CR2430.
- The THS-G3 is very compact and thin. the G2 is a little thicker.
- The THS-G3 has a measurement temperature range of 0-60 degrees. And the G2 is -9.9 degrees to about 60 degrees.
For distribution network work:
- Great design by pvvx et al. Opening the back cover and holding the C/F toggle button down for more than 7 seconds will reset the entire network configuration, at which point you can network again.
Regarding the battery:
- The current firmware (0.121) probably consumes around 25ua of power after completing the mating network, and a CR2032 battery is expected to last more than 8 months, but given the reported changes in different temperature variations, this expectation may behave differently.
- According to Pvvx's research, the Zigbee approach will consume a bit more than the BLE firmware, the protocol is more complex, and the reported data is a bit larger.
Where does it excel?
- The ink screen has a great display and has a partial refresh effect that makes it almost impossible to tell it's refreshed.
- Comes with a connection indicator button to know the device networking status.
- Comes with an original stand that fits seamlessly on a desktop.