Jem RF

05/28/2025

Zero waste toothpaste tablets sent in refillable glass containers that look great. Clean ingredients. Naturally Whitening. Plastic-free. Cruelty-free. Thousands of great reviews. No SLS, no parabens.

02/20/2025

Would you be interested in getting started with wireless sensors? Here is a helpful link to getting started. We have a few TARTS sensors on clearance.

Wireless Sensor Networks by Kat Seaton February 20, 2025 Share Share on Facebook Tweet Tweet on Twitter Pin it Pin on Pinterest

12/10/2024

We are closing out on some of our older sensors and test tools. Great discounts, search "Close Out" to see the list. , ,

12/10/2024

Been a good year, we added two new products, our Smart Gateway that when the Internet is down, it will store readings and upload to the server when the Internet is restored. This is great for those who need continuous monitoring. Check it out at https://www.jemrf.com/collections/rf-sensors/products/smart-gateway.
We also now have an AC Power Loss Detector https://www.jemrf.com/collections/rf-sensors/products/wireless-ac-power-detector that will send messages when the power is lost. When the power is restored you get a power good message. It will continue to operate for a few minutes after power loss. Assuming your Internet has battery backup. , ,

The JemRF Power Monitor reports a loss of AC power using our Wireless RF tools. Within two seconds of the loss, the sensor will message an RF Gateway that the power has gone off. The operating range is from 100 VAC to 240 VAC. You get status updates once a minute, a notification within 2 seconds of....

05/24/2024

A customer wanted me to replace some sensors because they were reading too high compared to his old thermometer. I replaced it with two more and they were 10 degrees warmer than is thermometer. So I took a calibrated NIST traceable sensor and it was 10 degrees warmer. By now he has had to move food out of the cooler because of "Fan" problems. He got a new thermometer and sure enough, it was 10 degrees over his old one. So trashed the old thermometer. Tried and true thermometers don't always last forever.

05/24/2024

For , , and Tart Wireless Sensors + or Found supplier of TART Wireless Sensors, the hobbyist's sensor line of Monnit at

Antique Electronics that work. Collection of S-100 vintage computers, boards, and parts Tart Sensors from Inventory Close Out

03/22/2024

Newest in the fleet. Temperature and Humidity M-series.

01/01/2024

Happy New Year!

11/10/2023

07/03/2023

We are happy to announce that the classic IOT Gateway for the Raspberry Pi and Orange PI computers has a sister model with a USB-A interface.
With the USB interface, you can use your existing Pi-based computers or your Windows 10/11-based computers.
Most of the existing PEP applications will run on Windows using Python 3.11 or higher. Only requires a one-line change of the serial port in the rflib.py application, and you are up and running.
Take a look at the new IoT Gateway USB Receiver for only $23.95.

IoT Gateway CISECO wirelessthings.net hub raspberry pi radio frequency rf cc1110 alarm system diy alert iot thing battery small secure encryption 128 bit 433 mhz 868 mesh network star network configure configurable over the air ota long lasting aws iot core google cloud thingsboard adafruit io zigbe...

06/25/2023

Great News for WiFi Sensor Owners!!!
The last of the Manual Firmware Updates!!!

The Firmware for the WiFi Sensor series has been updated to support future "Over The Air" Updates.
Once the last manual download, version 3.3.09, is required and installed, then all future updates will be done directly to the WiFi Sensor, eliminating future manual updates.
To validate downloads work, once updated to 3.3.09 and reset, the sensor will report an Update is available. That update is the official release 3.3.1.
Select Yes and save on the Setup page, and 3.3.1 will be downloaded and installed directly from the download server to the sensor to show OTA is working.

Firmware Releases and details at:

Control, monitor and receive email alerts from home alarm system using a Raspberry Pi.