Problem establishing PPP connection with UBLOX SARA-R510S

[robjderr]

I'm trying to establish a PPPoS connection to a SARA-R510S-00B module using the esp_modem module but the PPP session is failing. Here's the communication between the CONNECT and NO CARRIER responses. The same code works correctly with the SARA-R412M module.

Code: Select all

V (56356) DTE_WRITE: 0x3fcce69c   41 54 44 2a 39 39 2a 2a  2a 31 23 0d              |ATD*99***1#.|
V (56366) DTE_READ: 0x3fcd1344   0d 0a 43 4f 4e 4e 45 43  54 0d 0a 7e ff 7d 23 c0  |..CONNECT..~.}#.|
V (56366) DTE_READ: 0x3fcd1354   21 7d 21 7d 20 7d 20 7d  36 7d 22 7d 26 7d 20 7d  |!}!} } }6}"}&} }|
V (56366) DTE_READ: 0x3fcd1364   20 7d 20 7d 20 7d 21 7d  24 7d 25 96 7d 23 7d 24  | } } }!}$}%.}#}$|
V (56366) DTE_READ: 0x3fcd1374   c0 23 7d 28 7d 22 7d 27  7d 22 23 e1 7e           |.#}(}"}'}"#.~|
D (56376) esp_netif_handlers: esp_netif action has started with netif0x3fccd80c from event_id=0
V (56376) DTE_WRITE: 0x3c18bf58   7e ff 7d 23 c0 21 7d 21  7d 21 7d 20 7d 34 7d 22  |~.}#.!}!}!} }4}"|
V (56376) DTE_WRITE: 0x3c18bf68   7d 26 7d 20 7d 20 7d 20  7d 20 7d 25 7d 26 67 a8  |}&} } } } }%}&g.|
V (56376) DTE_WRITE: 0x3c18bf78   77 6f 7d 27 7d 22 7d 28  7d 22 cd 77 7e           |wo}'}"}(}".w~|
I (56376) cellular: CMUX mode set
V (56386) DTE_READ: 0x3fcd1344   7e ff 7d 23 c0 21 7d 22  7d 21 7d 20 7d 34 7d 22  |~.}#.!}"}!} }4}"|
V (56386) DTE_READ: 0x3fcd1354   7d 26 7d 20 7d 20 7d 20  7d 20 7d 25 7d 26 67 a8  |}&} } } } }%}&g.|
V (56386) DTE_READ: 0x3fcd1364   77 6f 7d 27 7d 22 7d 28  7d 22 26 7d 3e 7e        |wo}'}"}(}"&}>~|
V (59666) DTE_READ: 0x3fcd1344   7e ff 7d 23 c0 21 7d 21  7d 21 7d 20 7d 36 7d 22  |~.}#.!}!}!} }6}"|
V (59666) DTE_READ: 0x3fcd1354   7d 26 7d 20 7d 20 7d 20  7d 20 7d 21 7d 24 7d 25  |}&} } } } }!}$}%|
V (59666) DTE_READ: 0x3fcd1364   96 7d 23 7d 24 c0 23 7d  28 7d 22 7d 27 7d 22 4f  |.}#}$.#}(}"}'}"O|
V (59666) DTE_READ: 0x3fcd1374   d6 7e                                             |.~|
V (59666) DTE_WRITE: 0x3c18c5c0   7e ff 7d 23 c0 21 7d 24  7d 21 7d 20 7d 28 7d 23  |~.}#.!}$}!} }(}#|
V (59666) DTE_WRITE: 0x3c18c5d0   7d 24 c0 23 2c d4 7e                              |}$.#,.~|
V (59676) DTE_READ: 0x3fcd1344   7e ff 7d 23 c0 21 7d 25  7d 22 7d 20 7d 24 59 28  |~.}#.!}%}"} }$Y(|
V (59676) DTE_READ: 0x3fcd1354   7e                                                |~|
V (59676) DTE_WRITE: 0x3c18c5a0   7e ff 7d 23 c0 21 7d 26  7d 22 7d 20 7d 24 94 7d  |~.}#.!}&}"} }$.}|
V (59676) DTE_WRITE: 0x3c18c5b0   2d 7e                                             |-~|
V (59686) DTE_READ: 0x3fcd1344   0d 0a 4e 4f 20 43 41 52  52 49 45 52 0d 0a        |..NO CARRIER..|