Since I started driving the Honda Jazz GD1, I adjusted the aircon temperature through a knob, like any other driver would.
Many new cars however, now come equipped with digital readouts. I thought how nice it would be to retrofit the GD1 with a sensor that could tell me the ambient temperature.
So, for a long while, I had stared at the two gaps between the steering wheel and the speedometer. It felt like I could place a gadget there. I need not look far before chancing upon the Xiaomi Mijia Thermometer & Hygrometer Sensor over Lazada.
The seller sold the thermometer in a set of 3 for $13.30 (when I bought it in December 2020).
The Xiaomi sensor measures 43 by 43mm and is approximately 12.5mm thick. It uses a CR2032 battery and is still going strong after 6 months. I am pleased with its performance and use it inside the GD1 to give me a sensing of how cold my AC still is, and how unbearably warm it can be under the Singapore weather.
Note that the sensor will give you a different reading if you place it at the steering wheel like I did, compared to placing it by the vents. You could use adhesives to mount the sensor by the vents. I prefer it by the speedometer so my eyes do not flirt around much.
This is money well spent. I will gladly buy another set of 3 to place around my home. If you are looking to retrofit a thermometer and hygrometer to your car, consider the Xiaomi sensor.