Blank repl

[romanesko]

I've tried several prebuilt firmwares for my M5Stack

It's looks likes it flashes well as I see:

Connecting....
Chip is ESP32D0WDQ6 (revision (unknown 0xa))
Features: WiFi, BT, Dual Core, VRef calibration in efuse
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 921600
Changed.
Configuring flash size...
Auto-detected Flash size: 4MB
Compressed 20960 bytes to 12302...
Wrote 20960 bytes (12302 compressed) at 0x00001000 in 0.2 seconds (effective 1022.4 kbit/s)...
Hash of data verified.
Compressed 144 bytes to 69...
Wrote 144 bytes (69 compressed) at 0x0000f000 in 0.0 seconds (effective 249.4 kbit/s)...
Hash of data verified.
Compressed 1425456 bytes to 866019...
Wrote 1425456 bytes (866019 compressed) at 0x00010000 in 13.0 seconds (effective 876.2 kbit/s)...
Hash of data verified.
Compressed 3072 bytes to 126...
Wrote 3072 bytes (126 compressed) at 0x00008000 in 0.0 seconds (effective 4559.4 kbit/s)...
Hash of data verified.

but when I try to connect to REPL - it's just a blank screen with no reaction to the keyboard

[loboris]

How do you connect to M5Stack REPL ? It must be reset after flashing. ./BUILD.sh monitor should do it automatically, but there were some reports about M5Stack reset issues when the battery is connected. Try to reset it manually or run without the battery.

[nakanaela]

I am using the prebuilt MicroPython_LoBo_esp32_all firmware and I've encountered the same issue on the board found at http://a.co/d/111EGTI Rebooting returns the repl, but after adding files with ampy or flashing, the board is completely unresponsive if I connect to it.

I am using screen on Mac OS X mojave to connect and version 2.5.1 of esptool and version 1.0.7 of ampy. I'm not sure if this is a board related issue, but I wanted to share as the problem isn't confined to just the M5Stack