I'm running the at_client project one of our custom boards and am able to see the "AT host sample started" message, but it only responds to the first "AT" I sent. Any commands I enter after that return an ERROR;
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Peripheral Domain Status
00 NRF_P0 Non-Secure OK
01 NRF_CLOCK Non-Secure OK
02 NRF_RTC1 Non-Secure OK
03 NRF_NVMC Non-Secure OK
04 NRF_UARTE1 Non-Secure OK
05 NRF_UARTE2 Secure SKIP
06 NRF_TWIM2 Non-Secure OK
07 NRF_SPIM3 Non-Secure OK
08 NRF_TIMER0 Non-Secure OK
09 NRF_TIMER1 Non-Secure OK
10 NRF_TIMER2 Non-Secure OK
11 NRF_SAADC Non-Secure OK
12 NRF_PWM0 Non-Secure OK
13 NRF_PWM1 Non-Secure OK
14 NRF_PWM2 Non-Secure OK
15 NRF_PWM3 Non-Secure OK
16 NRF_WDT Non-Secure OK
17 NRF_IPC Non-Secure OK
18 NRF_VMC Non-Secure OK
19 NRF_FPU Non-Secure OK
The same firmware on the PCA10090 works fine and I am able to issue AT commands. The problem board also has no problems running code that makes use of the modem for LTE/GPS.
Modem FW v1.1.0
