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I've got one https://www.amazon.co.uk/gp/product/B01CYBHM26 on the way, should arrive today.
Can you confirm which pins of the usb-ttl I'm hooking to which pins on the ESP8266 module on the WiFi?
I'm guessing I can use the
+and-pins on the WiFi itself and hook those to the 5v and GND on the usb-ttl. Not sure where to hook RXD and TXD.Assuming https://github.com/espruino/EspruinoBoard/blob/master/WiFi/pdf/espruino_wifi_sch.pdf is oriented in the real world, I've guessed as per my attachment.
Should I hook usb-ttl RXD to ESP8266 RXD and TXD to TXD or do I want to crossover?
Also, while I think of it, do you have a copy of the AT 0.40 firmware? I was going to flash with 0.25 as it was the newest I could find from your downloads (https://www.espruino.com/files/ESP8266_AT25-SDK112-512k.bin), but I'd rather flash 0.40, I just can't find it.
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dave_irvine
Very odd - not sure what to suggest with trying to upgrade via the WiFi. Do you have a USB-TTL converter handy that you could try the upgrade with?