ESP8266 Community Forum

- Mon Feb 15, 2021 6:01 am #90519 Hi,

I just bought 3 pcs of ESP-01 together with USB to serial adapter. Testing it using the default firmware resulted in as follows:

1. Displays a few garbled characters then "ready" but inputting AT command does not result to anything, just the prompt returning to first column.

2. I tried flashing nodemcu_latest.bin dated 8/31/2015 and while it displays "lua: cannot open init.lua" it accepts entries and responds. However, what I need is the AT command as I just need the Esp-01 to send serial data via WiFi.

3. Then flashing it with AT22SDK100-2015-03-20-boot1.2.bin and *.3b.bin resulted in "MEM Check Fail !!!"

So I assume a have a good ESP-01s except that I have the wrong AT firmware to drive it.

Will appreciate any help pointing me to the right direction,
Vic

- Tue Feb 16, 2021 1:35 am #90525 use 1.7.4
https://www.espressif.com/en/support/do ... d%5B%5D=14

- Tue Feb 16, 2021 8:12 am #90533 Flashing boot_v1.7.bin and user1.1024.new.2.bin went well however,
I get a "float division by zero" error when trying to flash the esp_init_data_default_v08.bin to 0xfc000

- Wed Feb 17, 2021 1:27 am #90555

use 1.7.4
https://www.espressif.com/en/support/do ... d%5B%5D=14

Flashing boot*.bin and user1*.bin went well but flashing esp_init_data_default_v08,bin to 0xfc000 resulted in "float division by zero" error