- Thu Mar 16, 2017 4:45 pm
#63814
I have multiple ESP-12-Q which seem to show weird boot behavior:
GPIO15 is always grounded
GPIO0 GPIO2
(float, float) bootmode:(3,7) -> normal boot
(gnd, gnd) no result
(gnd, float) bootmode:(1,6) -> waits at bootloader
(float, gnd) bootmode:(2,6) followed by "fatal exception" messages
(high, float) no result
(high, high) no result
(float/gnd, high) brief led & tx blink, not sure which baudrate (nothing on 9600, 74880, 57600, 115200).
I tried both 1k Ohm, 10k Ohm and direct connections, results seem to be the same.
That doesn’t seem to match the specs though in which e.g. (high, high) should be normal boot.
Is that expected, or is there something off indeed?
GPIO15 is always grounded
GPIO0 GPIO2
(float, float) bootmode:(3,7) -> normal boot
(gnd, gnd) no result
(gnd, float) bootmode:(1,6) -> waits at bootloader
(float, gnd) bootmode:(2,6) followed by "fatal exception" messages
(high, float) no result
(high, high) no result
(float/gnd, high) brief led & tx blink, not sure which baudrate (nothing on 9600, 74880, 57600, 115200).
I tried both 1k Ohm, 10k Ohm and direct connections, results seem to be the same.
That doesn’t seem to match the specs though in which e.g. (high, high) should be normal boot.
Is that expected, or is there something off indeed?
