RC7620-1 Rel 9 - AT&V - Corrupted response

1

Hi ,
I’m testing RC7620-1 Rel 9
With release 9 I’m facing with this issue:
I cannot receive a correct answer from AT&V command at baudrate 230400 or greater.

…
TX: AT&K3
GSM RX: OK

TX: AT+IFC=2,2
GSM RX: OK

TX: AT+ICF=3,3
GSM RX: OK

TX: AT+KSLEEP=2
GSM RX: OK

TX: AT&D0
GSM RX: OK

TX: AT&V
GSM RX: &C: 2; &D: 0; &E: 0; &F: 0; &K: 3; &S: 0; &W: 0; E: 0; L: 0; M: 0; N: 0;
Q: 0; V: 1; X: 1; Z: 0; \Q: 3; \S: 0; \V: 0; O: 0; S0: 0; S2: 43; S3: 13;
S4: 10; S5: 8; S6: 2; S7: 0; S8: 2; S9: 6; S10: 14; S11: 95; S30: 0;
S95: 1; S103: 1; S104: 1; ^DSCI: 0; ^HSMSSS: 0,0,1,0; !MECALL: 0,0;
!MECALLCFG: 0,0,0,“”,A%= <<— MESS MESS MESS!
jjP55<<— MESS MESS MESS!
…
As you can see I’m receiving some bytes and after some dirty characters.
I’m using hardware flow controls.
In Release 8, with the same baudrates, same commands, worked well.
Also if I set port to baud rate at 115200 the response is good.

2

no problem is found on my side, seems to be your hardware issue:


ati3
Manufacturer: Sierra Wireless, Incorporated
Model: RC7620
Revision: SWI9X07H_00.08.24.02 f90cbd jenkins 2022/03/21 03:47:54
IMEI: 353634110012345
IMEI SV: 19
FSN: 7Q947200012345
+GCAP: +CGSM

OK
at&v
&C: 2; &D: 2; &E: 0; &F: 0; &K: 0; &S: 0; &W: 0; E: 1; L: 0; M: 0; N: 0;
Q: 0; V: 1; X: 1; Z: 0; \Q: 3; \S: 0; \V: 0; O: 0; S0: 0; S2: 43; S3: 13;
S4: 10; S5: 8; S6: 2; S7: 0; S8: 2; S9: 6; S10: 14; S11: 95; S30: 0;
S95: 1; S103: 1; S104: 1; ^DSCI: 0; ^HSMSSS: 0,0,1,0; !MECALL: 0,0;
!MECALLCFG: 0,0,0,"",0,0,5,8,1; !MECALLGPIO: 0,3,0; !MECALLMSD: "";
!MECALLMSDBLK: 1,""; !MECALLOPMODE: 0; !MECALLTXMODE: 0;
!MECALLUSLMSK: 0

OK
3

Ok thank you jyijyi, which baudrate you used? Flow control enabled?
I forgot to mention I’m on UART1

4

I am using baud 230400 in UART1

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