Am Freitag, dem 14.07.2023 um 21:52 +0200 schrieb zithro: > On 14 Jul 2023 10:53, Joe wrote: > > On Fri, 14 Jul 2023 09:27:12 +0200 > > Bruno Kleinert <fu...@debian.org> wrote: > > > > > Hello, > > > > > > I'm looking for a wireless way to measure temperature and humidity > > > indoor with hardware off the shelf and software included in Debian 12 > > > bookworm. > > > > > > Sensors --> Radio --> Receiver --> Any typical PC interface, e.g., > > > USB, Ethernet. > > > > > > I don't need a visual interface, but plan to process measured values > > > in shell scripts. > > > > > > Do you have any hardware recommendations and can you share experience? > > I use DS18B20 chips (1-wire protocol, nice for long distances cabling) > and some BME280s or MPL3115A2, plugged on Raspberry Pies. > The DS18B20 can be directly manipulated via sysfs, while the BMEs and > the MPL3115A2 need a software library to interpret the sensors output (I > use Adafruit's one, in python).
Since I had two DS18B20 1-wire sensors running, I had experience with that and liked its brain-dead simplicity to set up and use it. It seems to me, there's currently a shortage in availability in Germany's web shops. Also, some ready-to use sensors seemed expensive to me, so I put 1-wire technology on hold. For testing puprosed I bought a Raspberry Pi 3 Model B+ and I decided for Raspberry Pi Zero WH's and DHT20 temperature and humidity sensors, which apparently is a newish I2C version of the DHTs, and can just be wired to Raspberry Pis' IC2 connectors without any additional resistors (My soldering skills got terribly rusty). I used i2cdetect of the i2c- tools package to detect controllers and sensors and to play around with the sensors' data I currently use https://github.com/cjee21/RPi-DHT20/tree/main (not in Debian 12 bookworm). I'd prefere to use i2cget to read sensor data, but didn't manage to get it working, yet. Additionally I successfully can control a 4-relay board (controlled via 4 GPIOs) with gpioset of the gpiod package and I'm using a rain sensor (signalling via GPIO) as a water leakage sensor with gpioget and gpiomon from the gpiod package. I spontaneously decided to build a sprinkler system and currently wait for the magnet valves to arrive. I'm open to suggestions for a housing, as I didn't consider how to protect the electronics outside, yet. Funnily, I got crazy how charmingly well the stock (plus the firmware packages from non-free and/or non-free-firmware) Debian 12 bookworm images work on both Raspberry Pi types. Thanks a lot Gunnar, I think! 👍️ Thanks to everyone responding in the thread for your hints and pointers! Kind regards, Bruno
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