ESP8266 Community Forum

- Sat Aug 17, 2019 4:45 pm #83498 I have an ESP-07 that is (new) and acts strange. I program it fine but when it boots into normal mode, it's like it doesn't start anything. I've programmed it with different firmwares (tried AT and micropython) and both program fine but when I boot it to normal mode, the boot log looks fine but then nothing happens (I don't get my commands echoed back through minicom when using AT firmware, and I don't see it in Access Point mode when I try with micropython).

Code: Select allxx@xx:~ $ esptool.py --chip auto --port /dev/ttyAMA0 --baud 57600 write_flash --flash_size=detect -fm qio 0 esp8266-micropython-v1.11.bin
esptool.py v2.6
Serial port /dev/ttyAMA0
Connecting....
Detecting chip type... ESP8266
Chip is ESP8266EX
Features: WiFi
MAC: 84:f3:eb:ba:a1:4d
Uploading stub...
Running stub...
Stub running...
Configuring flash size...
Auto-detected Flash size: 1MB
Flash params set to 0x0020
Compressed 617880 bytes to 402086...
Wrote 617880 bytes (402086 compressed) at 0x00000000 in 72.6 seconds (effective 68.0 kbit/s)...
Hash of data verified.

Leaving...
Hard resetting via RTS pin...

I then pull GPIO0 high, Booting to normal mode.....

Code: Select allxx@xx:~ $ miniterm.py /dev/ttyAMA0 74880
--- Miniterm on /dev/ttyAMA0  74880,8,N,1 ---
--- Quit: Ctrl+] | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H ---

 ets Jan  8 2013,rst cause:2, boot mode:(3,6)

load 0x40100000, len 31024, room 16
tail 0
chksum 0xef
load 0x00000000, len 0, room 8
tail 0
chksum 0xef
load 0x00000000, len 0, room 0
tail 0
chksum 0xef
csum 0xef
csum err
ets_main.c

I do see that in normal boot mode, GPIO 0 is at 1.8v and I would expect that to be 3.3v like Vcc, Rst, CH_PD, etc. Maybe that is normal though. Any suggestions as to why it's not running anything after doing a boot log ?
thanks

- Thu Aug 22, 2019 7:39 am #83546 What are you doing to power the ESP-07?

Programming doesn't use much current. When the chip goes though the radio initialization it draws a high peak current. This may, or may not, be an issue for you.

- Thu Aug 22, 2019 8:08 am #83547

Code: Select allchksum 0xef
csum 0xef
csum err
ets_main.c

Flashing failed (I can't tell you the reason): there's a checksum error in the image.

Assumption is the mother of all f*ckups. At least: that's what I'm assuming.

- Fri Aug 23, 2019 3:03 am #83559 gpio0 behaviour is normal as it outputs cpuclk during boot...