WH51 Wireless Soil Moisture Sensor

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WH51 Wireless Soil Moisture Sensor

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This device is supported, you need to use an -fsk build

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And what is an -fsk build? Would the LILYGO® LoRa32 V2.1_1.6.1 433 Mhz work with the sensor?

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The separate different modulation builds, for Heltec and LilyGo, available in the current development build

lilygo-rtl_433-fsk

But your LilyGo would only work with the WH51, if you have the Oceania version which is also transmitting at 433MHz. If you have a European 868MHZ or North American 915MHZ WH51 version, you would need the appropriate MHz LiliGo LoRa32 V2.1_1.6.1.

Hope this clarifies things.

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So that would mean, for example, if I take the sensor at this url in the 868Mhz version then I would need to take the board at this in the SX1276 868Mhz version and flash the development firmware fsk, right?

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Correct, or get the 433 MHz Other Areas version of the WH51 if you already have a 433 MHZ LilyGo. Either way, the frequencies should match.

This is the general concept, and while I do not have a WH51 myself, it seems to work fine for others here in the forum. If you do ge the 868MHz version/LilyGo, you’ll likely also have to fine tune the frequency in the WebUI to 868.35 MHZ for proper reception …

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i use ttgo-lora32-v1 & 868,360 mhz and wh51 working great :slight_smile:

N: Send on /RTL_433toMQTT/Fineoffset-WH51/00cbd4 msg {“model”:“Fineoffset-WH51”,“id”:“00cbd4”,“battery_ok”:0.66667,“battery_mV”:1300,“moisture”:0,“boost”:0,“ad_raw”:25,“mic”:“CRC”,“protocol”:“Fine Offset Electronics/ECOWITT WH51, SwitchDoc Labs SM23 Soil Moisture Sensor”,“rssi”:-60,“duration”:10000}

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Many thanks for the feedback and help !