[Ovmsdev] SIMCOM PPP

[Tom Parker]

On 06/11/17 01:48, Michael Balzer wrote:
> Works in Germany with Hologram & roaming via Telekom.de:

I found the Hologram sim works in New Zealand via Vodafone, but the 
modem doesn't seem to healthy. Most of the time the OVMS doesn't 
successfully establish communication with the modem. I can see that the 
modem has 3.3V between pin 1 and pin 28, and pin 15 is being toggled 
during the power cycle, but it only gets to 2.8V. Most of the time I get 
the following over and over in the logs.

I (75539) simcom: State timeout, transition to 2
I (75539) simcom: State: Enter PoweringOn state
I (75539) simcom: Power Cycle
D (76539) SIMCOM tx: 41 54 0d 0a AT..
...
D (85539) SIMCOM tx: 41 54 0d 0a AT..
I (85539) simcom: State timeout, transition to 2
I (85539) simcom: State: Enter PoweringOn state
I (85539) simcom: Power Cycle

It seems to work rarely and randomly, or maybe I have a bad connection 
in my board? How would I go about diagnosing this?

I did find that if you forget to connect the antenna it doesn't connect 
to the cell network when it does work! That took an embarrassing amount 
of time to notice.

> …but the ip stack seems to crash on CREG 2:

Mine connected to the v2 server and then crashed, the stack trace looks 
the same as yours and the register content is similar.

I (69196) ovms-server-v2: Send MP-0 
S0,K,0,0,stopped,standard,0,0,0,0,0,0,0,21,0,0,0,0,0.00,0,0,0,0,-1,0,0,0,0,0,0,0,0.00,0.00,0
D (69206) SIMCOM ppp rx: 19 ac 50 18 39 08 47 00 00 00 4e 73 4d 50 53 74 
..P.9.G...NsMPSt
D (69206) SIMCOM ppp rx: 70 39 4e 67 3d 3d 0d 0a 61 3d 7e                
p9Ng==..a=~
D (69206) SIMCOM ppp tx: 7e 21 45 00 00 ae 00 06 00 00 ff 06 e1 1a 0a aa 
~!E.............
D (69206) SIMCOM ppp tx: c7 0f bc 8a 4b e5 54 0f 1a d3 00 00 19 ac a5 ce 
....K.T.........
D (69206) SIMCOM ppp tx: 2f 10 50 18 16 98 e6 d4 00 00 4e 73 4d 50 53 74 
/.P.......NsMPSt
D (69216) SIMCOM ppp tx: 70 30 4e 78 32 65 47 7a 66 43 4e 79 2f 72 6d 44 
p0Nx2eGzfCNy/rmD
D (69216) SIMCOM ppp tx: 62 6b 36 6f 4c 35 71 71 56 39 46 38 71 47 51 46 
bk6oL5qqV9F8qGQF
D (69226) SIMCOM ppp tx: 66 79 73 38 50 77 69 34 73 53 72 37 4e 63 4c 54 
fys8Pwi4sSr7NcLT
D (69236) SIMCOM ppp tx: 4d 74 71 32 46 34 67 44 65 62 6d 33 50 2b 5a 6a 
Mtq2F4gDebm3P+ZjGuru Meditation Error of type LoadProhibited occurred on 
core  1. Exception was unhandled.
Register dump:
PC      : 0x401724d9  PS      : 0x00060330  A0      : 0x8017251a A1      
: 0x3ffdaec0
0x401724d9: ip4_route at 
/home/ubuntu/esp/esp-idf/components/lwip/core/ipv4/ip4.c:250 
(discriminator 2)

A2      : 0x0000f01d  A3      : 0x00000000  A4      : 0x3ffead48 A5      
: 0x3f42695c
A6      : 0x00000008  A7      : 0x3ffdb0e8  A8      : 0x801724cd A9      
: 0x3ffdaea0
A10     : 0x00000000  A11     : 0x00000000  A12     : 0x3ffdca38 A13     
: 0x3ffdb0d0
A14     : 0x00000004  A15     : 0xab9423a7  SAR     : 0x00000018 
EXCCAUSE: 0x0000001c
EXCVADDR: 0x0000f0d2  LBEG    : 0x4000c349  LEND    : 0x4000c36b LCOUNT  
: 0x00000000

Backtrace: 0x401724d9:0x3ffdaec0 0x40172517:0x3ffdaee0 
0x40170706:0x3ffdaf00 0x4016ad7b:0x3ffdaf40 0x4016ad9d:0x3ffdaf70 
0x4016ae3e:0x3ffdaf90 0x4016b29c:0x3ffdafb0 0x4016e9d6:0x3ffdafd0 
0x4016ea17:0x3ffdaff0 0x40177441:0x3ffdb010 0x40177805:0x3ffdb030 
0x4017784c:0x3ffdb050 0x4017a9e5:0x3ffdb070 0x4017773c:0x3ffdb090 
0x4017deba:0x3ffdb0b0 0x4017def6:0x3ffdb0d0 0x401795c9:0x3ffdb0f0 
0x4017b005:0x3ffdb110 0x4017b0b0:0x3ffdb130 0x401793eb:0x3ffdb150 
0x40177269:0x3ffdb170 0x4019e244:0x3ffdb1a0 0x4019e391:0x3ffdb1c0 
0x40165999:0x3ffdb1e0
0x401724d9: ip4_route at 
/home/ubuntu/esp/esp-idf/components/lwip/core/ipv4/ip4.c:250 
(discriminator 2)

0x40172517: ip4_route_src at 
/home/ubuntu/esp/esp-idf/components/lwip/core/ipv4/ip4.c:159

0x40170706: tcp_rst at 
/home/ubuntu/esp/esp-idf/components/lwip/core/tcp_out.c:1336 
(discriminator 4)

0x4016ad7b: tcp_abandon at 
/home/ubuntu/esp/esp-idf/components/lwip/core/tcp.c:1630

0x4016ad9d: tcp_abort at 
/home/ubuntu/esp/esp-idf/components/lwip/core/tcp.c:1630

0x4016ae3e: tcp_netif_ipv4_addr_changed_pcblist at 
/home/ubuntu/esp/esp-idf/components/lwip/core/tcp.c:1630