Let's Control It

I have an application where RFLink might work. It involves using 6-8 temperature sensors in different close proximity locations.
Does anyone know of any off the shelf weatherproof temperature sensors that are addressable so their temperature data can be decoded on a individual sensor output?
This would be for use in the USA in case frequency coverage is an issue.

If it is in (relative) close proximity, why not use Dallas 1wire sensors?

Running wire between the locations is not practical. In a couple locations, there is a driveway between sensor locations.

Should the sensor units be battery powered?
If not, then you can also have a look at ESPEasy and install several of them.

For battery powered ones I don't have a model to suggest.

I'm a HUGE fan of esp easy!
But yes I was looking for something battery powered.
Also was looking for something with better range than wifi. I've used Wemos, esp8266 and sonoff devices with very very poor range.

Well I recently added support for LoRaWAN via the Microchip RN2483, so a range of several km is also an option and on location you could share the values via p2p protocol (one as AP, the others as wifi client)

Still not a battery-powered solution as WiFi + battery is not a good solution.

Looks like the RN2483 is only available as a standalone radio chip? Any ESP devices running it imbedded?
I thought it would be an advantage to find an existing temp sensor already in a rain proof enclosure with a battery. Instead of having to create my own design with individual components. So far I have struck out.

Well there are Bluetooth sensors available, but not sure how far those reach.
These can run quite long on a coin cell and are quite small. Some even have a plug-able external temp sensor (probably using a 1Wire Dallas)
If I'm not mistaken, RpiEasy has support for Bluetooth sensors?

Hi, did you get a solution?
If not, tell me a bit more about what you're trying to do. Sense air temp, water temp, ground temp?
You said 6-8 temp sensors. Can some of these be wired? so run 4 dallas temp sensors to a single ESP to transmit? Have a second with another 4 sensors?

Carl

No I still have not found a solution.
The application is for temperature monitoring in multiple greenhouses. Several are side by side but a couple have a driveway between them. Running wires between the greenhouses is not desired. The owner is looking for a wireless solution. Battery powered would be preferred but not a deal breaker. All buildings are located in an area approx 100 feet by 200 feet.

I'm a huge fan of espeasy and have several esp8266s flashed and reporting temperatures to Node Red at my house. However I have discovered the wifi range of these units to be very poor here at home. I've looked at lora but haven't found a non ITT tutorial. This application only needs to be local and not pushed to the Cloud.

That's why I thought maybe using commercial available battery powered 433 MHz temperature sensors might be the answer.

prairietech wrote: ↑12 Apr 2020, 16:55 That's why I thought maybe using commercial available battery powered 433 MHz temperature sensors might be the answer.

My experience with 433MHz is very poor coverage. E.g. with the receiver inside our house, I could not pick-up a Oregon 433MHz temperature sensor 10 meters away
I'm only using Wi-Fi now, with a couple of Access Points placed in different areas.

Try using https://github.com/happytm/BatteryNode. I have not tested the range but you can try it.

Thanks.

Thanks for the link! Lots to digest but might be what I've been looking for.

The ProbeReceiver.ino code above has MQTT output for RSSI singnal strength of all connected battery powered devices to it.It will be easy to check range of ESP8266 device by running these 2 sketches and using https://play.google.com/store/apps/deta ... h&hl=en_US app on smartphone. Theoretically ProbeReceiver.ino sketch also can be used to extend the range of devices for hundreds of meters as long as power is available at least every few meters for device to keep it running all the time. Basically it can be used as a MQTT repeater between 2 devices thereby doubling the range.

Thanks.