Infinite boot loop

Hi, all!
I`m having trouble with firmware newer than 1.87, no matter which boot version is uploaded (tried 1.6, 1.5, 1.4) the module goes to infinite boot loop

 ets Jan  8 2013,rst cause:2, boot mode:(3,0)

load 0x40100000, len 2408, room 16 
tail 8
chksum 0xe5
load 0x3ffe8000, len 776, room 0 
tail 8
chksum 0x84
load 0x3ffe8310, len 632, room 0 
tail 8
chksum 0xd8
csum 0xd8

2nd boot version : 1.6
  SPI Speed      : 40MHz
  SPI Mode       : QIO
  SPI Flash Size & Map: 8Mbit(512KB+512KB)
no GPIO select!
jump to run user1 @ 1000

rf_cal[0] !=0x05,is 0xFF

load 0x40100000, len 1856, room 16 
tail 0
chksum 0x63
load 0x3ffe8000, len 776, room 8 
tail 0
chksum 0x02
load 0x3ffe8310, len 552, room 8 
tail 0
chksum 0x79
csum 0x79

2nd boot version : 1.5
  SPI Speed      : 40MHz
  SPI Mode       : QIO
  SPI Flash Size & Map: 8Mbit(512KB+512KB)
jump to run user1 @ 1000

rf_cal[0] !=0x05,is 0xFF

On 1.87 the module boots pretty fine even with 1.6 boot version

The module is ESP-01 with 1Mb of flash

Here is the esptool upload terminal string

D:\esp8266\esptool>esptool.py -p COM2 -b 115200 write_flash --flash_freq 40m --f
lash_mode qio --flash_size 1MB 0x0000 D:\esp8266\espruino\188\boot_v1.5.bin 0x10
00 D:\esp8266\espruino\188\espruino_esp8266­_user1.bin 0xFE000 D:\esp8266\espruin
o\188\blank.bin

Any ideas? Thanks in advance!

Hi @Questdoino,

first erase the flash

esptool.py -p COM2 -b 115200 erase_flash

and then use a complete flash sequence like described here ...

I have had no issues using v91 with the included 1.6 bootloader - I have some with that, and some with 1.4, and no problems with either of them.

Sure I'm erasing the flash before uploading

OK, the flash statement you named is missing the esp_init_data_default.bin part

Still having problems with 1.88, 1.90, 1.91...

MaBe,
I`m a dumb, thanks)

I have the same issue, with 2.1... still don't know what I'm doing wrong.

> python "../esptool.py" --port COM6 --baud 115200 write_flash --flash_size 4MB-c1 -fm qio 0 espruino_2v10_esp8266_4mb_combined_4096.­bin

try the latest travis build file

http://www.espruino.com/binaries/travis/­master/