ESP8266 Community Forum

- Sat Jul 21, 2018 5:23 am #77298 I had successfully flash the new updated firmware SDK 2.0 to ESP01 Module but after updating the module I was getting some error like this:

........
......
load 0x4010f000, len 1264, room 16
tail 0
chksum 0x42
csum 0x42
~ld
....
.....
jump to user 1 ...(1000) and something

To solve this issue:
1. I tried different power sources
2. Added a 220uf and 100nF capacitor
3 Pulled up the GPIO0 and 2 both using 10K resistor
4. Flash size to 4Mbit from 8Mbit

till here I was getting readable answer

But after changing the SPI Mode to DIO in ESP Flash Tool 3.6.4, and Flashing the ESP I started getting unreadable output in the serial monitor so I changed back the SPI Mode to QIO but the same unreadable output, it seems like it is responding in its way such as short output for AT and little long for AT+RST and so on..
So I tried changing the Boud Rate but did not receive any readable output from esp, Can any one please help me to figure this out..
Can I get back my module to reply some readable answer..

- Mon Jul 23, 2018 8:00 pm #77366 That's not an error. That's the normal checksum. When you first boot it up it sends that at 74880bps so that must be what your serial monitor is configured at. So you need to make sure your baud rate in your program matches the baud rate of the serial monitor.