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Simple WiFi monitor with ESP32

  • Post date 2024-03-24
  • Categories Experiments
To be able to measure the Wifi quality over time I created a small program for ESP32, probably works for ESP8266 also, that every five minutes reports the ping RTT to the local gateway and the RSSI to the connected AP. The idea is to get a handful cheap ESP32 boards and litter them around the house and send the data to influx-db to be able to create a dashboard. And to be clear, this is not a project, just a small experiment to see if it's feasible to use ESP32 to monitor this. You can find the [...]

Arduino โ€“ The port doesnโ€™t exist

  • Post date 2024-02-24
  • Categories Random
I have a handful of cheap ESP32 development boards, and some expensive, that all sometimes gives me the error A fatal error occurred: Could not open COM6, the port doesn't exist. But I have found a workaround. The simplest way I found is to start with opening the Serial Monitor (in Arduino IDE) to see the status of the com-port easily. Then unplug the USB cable from the dev-board, hold down the EN / reset switch while plugging it in again. If it worked (which it does 9/10 times) the yellow bar [...]
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