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  • 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!

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