Comparing revisions for MiBluetoothTempESPHome
- [7925] 2022-05-26 02:55:13 by ZorrUno (unregistered user)
- [7931] 2022-05-27 01:15:24 by ZorrUno (unregistered user)
Additions:
Sensors are around NZ$8.50 incl GST when I bought 4 of them (they even have batteries installed, a CR2032)
Use Esphome and an ESP32 dev board (with nothing except 5V connected to it) to pull the values of these temp sensors and integrate them into home assistant.
-- The website says they will measure down to 0 degrees, and the original plan was to use in my fridges and freezers so some might need to be repurposed.
-- I couldn't wait for some Dev boards from China and Jaycar had some half price ESP32 boards so I grabbed a couple to play with
-- These were a problem (I had a couple of esphome based projects I wanted to play with) as when I connected them, the logs showed they wouldn't connect to wifi. Logs showed this:
There is a bit of a jumble of information in there, but I found that if I pulled the 0 pin to ground via a resistor (they suggested 330 Ohm, but currently I have about 480Ohm) it seems to boot and connect to wifi stably. I only had to do this once, and it seems like it connects on a reboot but time will tell. Also pulling 0 low was often easier to flash the firmware when needed.
Use Esphome and an ESP32 dev board (with nothing except 5V connected to it) to pull the values of these temp sensors and integrate them into home assistant.
-- The website says they will measure down to 0 degrees, and the original plan was to use in my fridges and freezers so some might need to be repurposed.
-- I couldn't wait for some Dev boards from China and Jaycar had some half price ESP32 boards so I grabbed a couple to play with
-- These were a problem (I had a couple of esphome based projects I wanted to play with) as when I connected them, the logs showed they wouldn't connect to wifi. Logs showed this:
There is a bit of a jumble of information in there, but I found that if I pulled the 0 pin to ground via a resistor (they suggested 330 Ohm, but currently I have about 480Ohm) it seems to boot and connect to wifi stably. I only had to do this once, and it seems like it connects on a reboot but time will tell. Also pulling 0 low was often easier to flash the firmware when needed.
Deletions:
Use esphome in an ESP32 dev board to pull the values of these temp sensors and integrate them into home assistant.
I couldn't wait for some Dev boards from China and Jaycar had some half price ESP32 boards so I grabbed a couple to play with
==CH340 Serial-USB in Ubuntu==
Getting the CH340 based serial working in ubuntu was annoying, I suspect however in windows you'd need to install the driver. The link I used to troubleshoot is below as errors show up in logs for BRLTTY. This is apparently what unix uses to gain access to serial ports by users.
https://unix.stackexchange.com/questions/670636/unable-to-use-usb-dongle-based-on-usb-serial-converter-chip
$ for f in /usr/lib/udev/rules.d/*brltty*.rules; do
sudo ln -s /dev/null "/etc/udev/rules.d/$(basename "$f")"
done
$ sudo udevadm control --reload-rules
$ sudo systemctl mask brltty.path
Created symlink /etc/systemd/system/brltty.path → /dev/null.
==Wifi Issues==
These were a problem (I had a couple of esphome based projects I wanted to play with) as when I connected them, the logs showed they wouldn't connect to wifi. Logs showed this:
There is a bit of a jumble of information in there, but it appears it is a voltage issue when using the UART. I found a solution that if I pulled the 0 pin to ground via a resistor (they suggest 330 Ohm) it seems to boot and connect to wifi stably. Time will tell. Also pulling 0 low was often easier to flash the firmware when needed. Having the resistor off seems to not work reliability.