Solar Powered CAREUD U800WF Monitoring System Checks Your Car’s Tires Pressure

Every few months, we inflate (or deflate) our car tires at the gas station to match the pressures for front and rear tires given by the manufacturer. But if you want to make sure the pressures are always at their optimal levels, or close to it CAREUD U800WF pressure monitoring system might be a useful little gadget. The monitor that you can place on your dashboard comes with the following specifications: Display showing pressure with +/- 1.5 PSI accuracy and temperature with +/- 3 °C accuracy for all four tires; data updated every 3 seconds. Connectivity – 433.92 MHz RF Power Supply Solar Panel 5V via micro USB port 900 mAh Li-ion Battery Temperature Range – Storage: -30 to 85 °C; operating: -20 to 80 °C IP Rating – IP5K4K (The “K” in the ingress protection rating means it complies with ISO 20653:2013 Road Vehicles-Degrees of protection) Dimensions – 76 […]

Karl’s Home Automation Project – Part 2: 433 MHz / WiFi MQTT Bridge, Door & PIR Motion Sensors

Karl here again for part 2 of my home automation project. We will be looking at how to automate your lights based on time of day and motion. In the first part we setup Home Assistant and uploaded firmware to basic Sonoff Wifi switches. Today we will setup a 433 MHz to MQTT bridge and some sensors. 433 MHz Depending on your country 433 MHz is an open frequency to use to communicate with. There are hundreds of different types of devices that use 433 MHz to communicate information. We will be focusing on 2 today from Gearbest: WMS07 motion sensor (left) and WDS07 door/window sensor (2 parts, right). I am not taking the door/window sensor apart, since it is super basic, but I’ve included some photos of the PIR motion detector. 433 MHz Bridge While contemplating how to get presence on a per room basis I ran across this […]