General Discussion

The nRF24 is good for short distances ~10m. That distance can be extended because nodes can also be a repeater to the gateway. I'm using an RPi zero 2W for my gateway (which is also my irrigation controller.) Can you reach your greenhouse with WiFi? This may work for you. I'd look at the RFnano that has the nRF24 integrated. It costs about more than a Nano and nRF24 separately, but what you gain is no wiring and no wiring failures. I tried to used this moisture sensor and it corroded within a year. DHT-12 (digital humidity and temperature) can be off as much as 4°C per the specs and suffers from the same corrosion challenge. Speaking of corrosion, be sure to "paint" all your electronics with electrical lacquer sealer (but not on the sensors) You have to consider how you're going to power your sensors. I'm not a big fan of batteries because you have to jump through a lot of hoops to get the most out of the batteries. On the flip side, you'll have to run 5V to all your sensors. This is my [pathetic] attempt at a remote soil sensor

Start with a simple communication method like Bluetooth or Wi-Fi on your sensor platform, use something like Arduino/ESP32 with a mobile app (e.g., Flutter or React Native), send data via APIs or Bluetooth, and design your platform to expose readable data and basic control commands for the app.

I get what you mean. One thing I still appreciate with MySensors is the control over how nodes communicate and behave, especially for simple, purpose-built setups. It’s not always the quickest to deploy, but it can be more predictable long-term for small, dedicated systems.

This is really not a MySensors topic! Just by the way present you request indicates that you are way over your head. I have a degree in electrical engineering, the study of electrical energy generation, transmission, distribution, etc. and substation design would take me years of study to be competent. Any discussion about electrical energy delivery start with safety. Fuses and breakers, basically, but these have to be able to break 1000's of amps ... not a trivial task. The trick is to bring down the circuit without damaging other equipment on the circuit. Just detecting a fault is a doctoral candidate dissertation. Basic components: transformers, breakers, switches and a lot of instrumentation. Voltage levels are pretty much already defined because the equipment available is already set for those levels. Transformer basic rating is KVA, input and output voltage. There's a lot more to it ... a lot more. As far as books for beginners ... I can't imagine that there are any. There are probably books for people who have been in the industry for more than a few years.

Welcome @aliansari. I hope MySensors gives you as much you as it has given many others.

Glad you clarified the scope of your project. Small scale solar projects are much easier. One of my projects is a "battery powered soil moisture sensor, battery recharged by a solar panel" I use a tp4056 board to charge the battery from a 1W solar panel My Arduino Nano wakes up every hour to sample the moisture report the current moisture level. Corrosion is problematic. My house battery project is really outside the scope of MySensors, I'll send that in a chat

I'm not sure about Tart, but Grove is an interface for I2C that is used by Seeed studio. With the right connector, it should be easy to make a Grove compatible MySensors node. Adafruit has Stemma and Sparkfun has Qwiic. These are all similar ways to make I2C sensors more plug and play (at least from a hardware perspective).

I turned off the affiliate setup on openhardware when CodeGarage took over the cost of hosting MySensors/OpenHardware.io along with turning off all google ads. The "Buy" functionality on openhardware.io involved alot of manual handling and support. It was not worth the effort. You can still make a donation to @sundberg84 when using his designs. I'm sure he appriciate it. [image: 1769085508704-99017911-478a-449e-8ec1-f55ee103f378-image.png]

Thanks ! Hi, this is a great news for MySensors ! I was testing Blue Pill (stm32f1) with stm32 maple core and display library, and now moving to the stm32duino core : everything is ok, and sleep mode seems promising. I have few Black Pill (stm32f4), waiting for test. The hal library is so complete now !

@nagelc wow, you're right! Last time I had bothered looking, it had been multiple years I think since the last commit. Thanks for saying something - I had no clue!

@tekka Thank you!

Thanks for reporting @Honk @hek has fixed the cert issue now

@OldSurferDude Thanks!

Merry Christmas all!

@Arvie_Mamayson It was fixed a couple of weeks ago. I just tested and works for me

I concur with @TheoL, though I understand the desire to have better control over your interface. The MySensors serial interface is well documented. You might consider MQTT as a transport mechanism. MQTT Explorer allows you to view the data which makes debugging easier. Good luck with your project.

@David-Jenkins Hi, good evening!! I can't find these examples. Can you share the link to the sketches? Thank you so much!