UART log:
21:53:39.646 -> Booting FW ver 0x0000010000000009 (at 0x0010efd8, exported at EE 0x0000eff8)
21:53:39.646 -> Best settings at 0x06a726, revision 3649
21:53:39.646 -> DATA slot 0x010000: type⸮0x49⸮d47⸮1 ver 0x000000006d0dd5f2 size ⸮5766
21:53:39.693 -> DATA s⸮ot 0x018000: type 0x494d4721 ver 0x00000000e8d1ca⸮6 size 15766⸮
21:53:39.693 -> DATA slot 0x020000: type 0x494d4721 ver 0x0000000⸮eb61934f size 15766
21:53:39.693 -> DATA slot 0x028000⸮ type 0x494⸮4721 ver 0x000⸮0000f60⸮42d⸮ size 15766
21:53:39.740 -> DATA slot⸮⸮x030000: type 0x494d4721 ver 0x00000000⸮c555c41 size 157⸮6
21:53:39.740 -> DAT⸮⸮⸮lot 0x038000: type 0x494d4721 ver⸮⸮⸮00000⸮00fdb89⸮2c size 1⸮662
21:53:39.740 -> DATA slot 0x040000:⸮⸮ype 0x49⸮d472⸮ ver 0x0000000⸮fe0⸮2a3⸮ size 15662
21:53:39.740 -> DATA slot 0x048000: type 0x494d⸮721 ver 0xf⸮fffffffffff⸮ff size -1
21:53:39.787 -> DATA slot 0x⸮50000: type 0x00000000 ver 0x00000000000⸮0000 size 0
21:53:39.787 -> DATA ⸮⸮⸮t 0x058000: typ⸮0xffffffff ver 0xffffffffffffffff size -1
21:53:39.787 -> DATA slot 0x06⸮000: type 0xffffffff ver 0xff⸮ffff⸮fffff⸮ff size -1⸮⸮RX pkt: 0xf3 + 33
21:53:40.115 -> checkin OK!
21:53:40.115 -> Drawing image at 0x00048000 size -1
21:53:40.256 -> :Boot⸮⸮Booting FW ver 0x0000010000000009 (at 0x0010efd8, exported at EE 0x0000eff8)
21:53:41.334 -> Best settings at 0x06a726, revision 3649
...
After battery change boot loop caused. Low batt for a few days, "no image data" on epaper at the end.
Quick fix: reflash FW (./uartTool /dev/ttyAMA0 updateDmitry < QSPI.BWR.bin)
UART log: 21:53:39.646 -> Booting FW ver 0x0000010000000009 (at 0x0010efd8, exported at EE 0x0000eff8) 21:53:39.646 -> Best settings at 0x06a726, revision 3649 21:53:39.646 -> DATA slot 0x010000: type⸮0x49⸮d47⸮1 ver 0x000000006d0dd5f2 size ⸮5766 21:53:39.693 -> DATA s⸮ot 0x018000: type 0x494d4721 ver 0x00000000e8d1ca⸮6 size 15766⸮ 21:53:39.693 -> DATA slot 0x020000: type 0x494d4721 ver 0x0000000⸮eb61934f size 15766 21:53:39.693 -> DATA slot 0x028000⸮ type 0x494⸮4721 ver 0x000⸮0000f60⸮42d⸮ size 15766 21:53:39.740 -> DATA slot⸮⸮x030000: type 0x494d4721 ver 0x00000000⸮c555c41 size 157⸮6 21:53:39.740 -> DAT⸮⸮⸮lot 0x038000: type 0x494d4721 ver⸮⸮⸮00000⸮00fdb89⸮2c size 1⸮662 21:53:39.740 -> DATA slot 0x040000:⸮⸮ype 0x49⸮d472⸮ ver 0x0000000⸮fe0⸮2a3⸮ size 15662 21:53:39.740 -> DATA slot 0x048000: type 0x494d⸮721 ver 0xf⸮fffffffffff⸮ff size -1 21:53:39.787 -> DATA slot 0x⸮50000: type 0x00000000 ver 0x00000000000⸮0000 size 0 21:53:39.787 -> DATA ⸮⸮⸮t 0x058000: typ⸮0xffffffff ver 0xffffffffffffffff size -1 21:53:39.787 -> DATA slot 0x06⸮000: type 0xffffffff ver 0xff⸮ffff⸮fffff⸮ff size -1⸮⸮RX pkt: 0xf3 + 33 21:53:40.115 -> checkin OK! 21:53:40.115 -> Drawing image at 0x00048000 size -1 21:53:40.256 -> :Boot⸮⸮Booting FW ver 0x0000010000000009 (at 0x0010efd8, exported at EE 0x0000eff8) 21:53:41.334 -> Best settings at 0x06a726, revision 3649 ...