I have an issue with WiFi connection to my printer. I had to use the Fallback procedure #3 after accidentially pressed erase button. I installed 1.21RC4 software, then the proper DuetWiFiServer.bin and DuetWebControl. But during installing WiFiServer i've got something like this:
Trying to connect at 230400 baud:
Erasing 4096 bytes…
Erasing 233472 bytes...
WiFi module started
Error: Failed to initialise WiFi module, code -7
After sending M552S0 it give back the same error.
Info after sending M115:
FIRMWARE_NAME: RepRapFirmware for Duet 2 WiFi/Ethernet FIRMWARE_VERSION: 1.21RC4 ELECTRONICS: Duet WiFi 1.0 or 1.01 FIRMWARE_DATE: 2018-03-11 build 1
Could you tell me please, what this error means? What I have to do to connect by WiFi?