1) ESP32 - I wanted to try out the new kid on the block chip, especially since the arduino-based toolchain for it is fairly mature. One of the interesting things that the ESP32 enables is IOT with its built in wifi and bluetooth capabilities. The community has written multiple libraries to make this somewhat straightforward (webservers, AP’s, wifi clients, mDNS, etc, etc.).
2) Cheap OLED screens - Back in 2007 I made a gauge using a TFT that sat in the place of the clock on a GD (2004-2007) WRX. TFT come in various flavors. Some work better at night, some work better in the day, etc. But none of them work in all conditions. I didn’t realize the error of my ways until one of the gauges I used was useless during a forum member’s sunny track day. Enter OLED, which are awesome for automotive applications. They are not too bright at night and (more importantly) are visible in most sunlight conditions.
This is a two for one instructable as I wrote everything for two common car gauges, oil pressure and turbo pressure. Both are essentially the same thing: a small form factor gauge with an animate analog-look OLED display with discrete numbers and maximums displayed. Both also function as wifi AP’s and webservers. When one connects to them via a computer or cell phone a moving EKG stype chart is viewable (this is the somewhat innovative part).
1) ESP32 - I wanted to try out the new kid on the block chip, especially since the arduino-based toolchain for it is fairly mature. One of the interesting things that the ESP32 enables is IOT with its built in wifi and bluetooth capabilities. The community has written multiple libraries to make this somewhat straightforward (webservers, AP’s, wifi clients, mDNS, etc, etc.).
2) Cheap OLED screens - Back in 2007 I made a gauge using a TFT that sat in the place of the clock on a GD (2004-2007) WRX. TFT come in various flavors. Some work better at night, some work better in the day, etc. But none of them work in all conditions. I didn’t realize the error of my ways until one of the gauges I used was useless during a forum member’s sunny track day. Enter OLED, which are awesome for automotive applications. They are not too bright at night and (more importantly) are visible in most sunlight conditions.
This is a two for one instructable as I wrote everything for two common car gauges, oil pressure and turbo pressure. Both are essentially the same thing: a small form factor gauge with an animate analog-look OLED display with discrete numbers and maximums displayed. Both also function as wifi AP’s and webservers. When one connects to them via a computer or cell phone a moving EKG stype chart is viewable (this is the somewhat innovative part).
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