Trying to upload a sketch over WiFi, gives me the following error: “avrdude: stk500_recv(): programmer is not responding Avrdude: stk500_getsync() attempt x of y: nt in sync: resp=0x00”

The errors you are getting when the upload failed typically occur when the IDE can’t connect to the ESP-01. Some of the reasons this may happen are:

• ESP-01 is not powered on.
• ESP-01 is not connected to WiFi (wrong SSID/password, too far away from router) – Invalid SSL certificate or incorrectly installed Certificate Authority.
• Failure of the DNS system to map the hostname to an IP address.
• Connection is already in use (i.e. the DriverStation is connected to the ESP-01).