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Christian,<br>
<br>
the user way to power off/on the modem is via "power cellular
off/on", that's what I test/ed, and that works.<br>
<br>
After having no issues now with the 7600, I did the tests with my
old 5360 module.<br>
<br>
That generally also worked, with one exception: on one of four crash
reboots, the cellular system got stuck in PowerOffOn state, with
state ticker at 0 and no more activity.<br>
<br>
Logs attached.<br>
<br>
Regards,<br>
Michael<br>
<br>
<br>
<div class="moz-cite-prefix">Am 30.03.25 um 13:08 schrieb Info via
OvmsDev:<br>
</div>
<blockquote type="cite"
cite="mid:05d580ce-8050-4471-a696-6362be6efc2d@zeitnitz.eu">
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Michael,<br>
one more thing: if you are performing another test, please check
from the console, that the powering of the modem works as well.<br>
<br>
cellular setstate PoweringOff <br>
cellular setstate PoweringOn<br>
<br>
It did not work when I started with the 7670 and I had to modify
ovms_cellular (set m_powermode according to the state) to get it
going.<br>
<br>
Thanks<br>
Christian<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">Am 30.03.2025 um 12:02 schrieb Info
via OvmsDev:<br>
</div>
<blockquote type="cite"
cite="mid:42fc0d46-6aec-42eb-8d3d-04ef05ca9b5f@zeitnitz.eu">
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content="text/html; charset=UTF-8">
OK, thanks Michael. <br>
At least this was an easy fix.<br>
<br>
Had a look at the NMEA code and I screwed up the istringstream
object when checking for the CGNSSINFO string.<br>
Fixed it and I hope this works now as well.<br>
<br>
Best regards<br>
Christian<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">Am 29.03.2025 um 18:42 schrieb
Michael Balzer via OvmsDev:<br>
</div>
<blockquote type="cite"
cite="mid:619a71a4-51dd-4a6a-a62c-1a432948f76d@expeedo.de">
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content="text/html; charset=UTF-8">
Christian,<br>
<br>
the GSM/PPP part now works smoothly with all standard
situations tested so far.<br>
<br>
But the GPS part doesn't work. It looks like the NMEA
sentences are received in the MUX channel, but not forwarded
to the NMEA module.<br>
<br>
V (794230) gsm-mux: ProcessFrame(CHAN=3, ADDR=0d, CTRL=ff,
FCS=fa, LEN=78)<br>
V (794230) gsm-mux: ProcessFrame(CHAN=3, ADDR=0d, CTRL=ff,
FCS=f4, LEN=82)<br>
<br>
These should be the NMEA sentences, but there are no
corresponding log entries from gsm-nmea.<br>
<br>
New logs attached.<br>
<br>
Regards,<br>
Michael<br>
<br>
<br>
<div class="moz-cite-prefix">Am 29.03.25 um 15:13 schrieb Info
via OvmsDev:<br>
</div>
<blockquote type="cite"
cite="mid:644ac35a-168c-44a5-8320-5a65f3f72d9e@zeitnitz.eu">
<meta http-equiv="Content-Type"
content="text/html; charset=UTF-8">
Hi Michael,<br>
thanks for testing.<br>
<br>
The results look odd, so I went back to the schematics of
OVMS modules and realized, that I was mistaken. The PWRKEY
pin is actually inverted in the modules as well. This
definetly explains the strange behaviour. <br>
<br>
I changed now the logic in simcom_powering.h and the
inverted PWRKEY level is now the default.<br>
<br>
Could you please run another test?<br>
<br>
Best regards<br>
Christian<br>
<br>
<div class="moz-cite-prefix">Am 29.03.2025 um 09:25 schrieb
Michael Balzer via OvmsDev:<br>
</div>
<blockquote type="cite"
cite="mid:1651ee05-ec1d-4677-a57c-a9ec7cfbbd6d@expeedo.de">
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Christian,<br>
<br>
well done on the 7670 support :-)<br>
<br>
I've just done some first tests of your branch on the
7600, which turned up some issues. Logs attached:<br>
<ul>
<li>Cold boot failed in 2 of 3 test boots, with the
driver getting stuck in a loop (poweredon / identify /
muxstart)</li>
<li>Regular shutdown fails to power down the modem in
time -- for a deep sleep phase, this would mean the
modem will remain powered on</li>
<li>After a crash, the modem driver gets somehow stuck
in PowerOffOn state<br>
</li>
</ul>
It seems the test for reaction ("AT") sometimes gets
skipped, even though the modem isn't ready yet.<br>
<br>
On the failed cold boot log, you can see this at the end:<br>
<br>
<font face="monospace"><b>I (389178) cellular-modem-auto:
Power Cycle</b><br>
I (389178) Simcom: Power Cycle - T_off 2500 ms - T_on
200 ms<br>
D (389178) events: Signal(system.modem.poweringon)<br>
D (389188) events: Signal(egpio.output.0.low)<br>
D (391678) events: Signal(egpio.output.0.high)<br>
D (396678) events: Signal(egpio.output.0.low)<br>
D (396878) events: Signal(egpio.output.0.high)<br>
<b>I (396878) cellular: State: Enter Identify state<br>
D (396978) cellular: tx-cmd: AT+CGMM</b><br>
D (396978) cellular: tx-cmd: AT+CGMM<br>
D (396978) cellular: tx-cmd: AT+CGMM<br>
D (396978) cellular: tx-cmd: AT+CGMM<br>
D (396978) cellular: tx-cmd: AT+CGMM<br>
D (396978) cellular: tx-cmd: AT+CGMM<br>
D (396978) cellular: tx-cmd: AT+CGMM<br>
I (397008) cellular: Identified cellular modem:
SIM7600/Experimental support for SIMCOM SIM7600<br>
D (397008) cellular: Remove old 'auto' modem driver<br>
I (397008) cellular: Set modem driver to 'SIM7600'<br>
<b>I (397008) cellular: State: Enter PoweredOn state</b><br>
D (397008) events: Signal(system.modem.installed)<br>
D (397008) events: Signal(system.modem.poweredon)<br>
D (406178) cellular: tx-cmd:
AT+CPIN?;+CREG=1;+CGREG=1;+CEREG=1;+CTZU=1;+CTZR=1;+CLIP=1;+CMGF=1;+CNMI=1,2,0,0,0;+CSDH=1;+CMEE=2;+CSQ;+AUTOCSQ=1,1;E0;S0=0<br>
D (408178) cellular: tx-cmd: AT+CGMR;+ICCID<br>
D (416178) cellular: tx-cmd: AT+CMUX=0;+CATR=6<br>
D (434808) cellular: mux-rx-line #0 (2/46): OK<br>
<b>D (434808) cellular: mux-rx-line #0 (3/39): RDY</b><br>
D (434808) cellular: mux-rx-line #0 (12/23): +CPIN:
READY<br>
D (434808) cellular: mux-rx-line #0 (8/11): SMS DONE<br>
D (434808) cellular: mux-rx-line #0 (7/0): PB DONE<br>
I (434808) cellular: State: Enter MuxStart state<br>
D (434808) events: Signal(system.modem.muxstart)</font><br>
<br>
<br>
Regards,<br>
Michael<br>
<br>
<br>
<div class="moz-cite-prefix">Am 26.03.25 um 13:13 schrieb
Info Zeitnitz via OvmsDev:<br>
</div>
<blockquote type="cite"
cite="mid:d5cf7822-c7a8-4729-b16d-a9cf74aaab00@zeitnitz.eu">Dear all, <br>
I finished to integrate the Simcom 7670 modem into the
OVMS code. <br>
See <a class="moz-txt-link-freetext"
href="https://github.com/zbchristian/Open-Vehicle-Monitoring-System-3.git"
moz-do-not-send="true">https://github.com/zbchristian/Open-Vehicle-Monitoring-System-3.git</a>
branch update_cellular. <br>
<br>
Modem Powering <br>
=============== <br>
I had problems to get the 7670 working with the current
code. The modem was stuck in a power cycle loop. <br>
<br>
I checked the Simcom documentation for the 4 models
5360, 7000 series, 7600, 7670 and the powering procedure
via the PWRKEY pin is the same, but with different
on/off timing. Depending on the hardware, the PWRKEY can
be inverted as well. This is the case for my Lilygo
TCall board, but I think not for the OVMS HW versions.
At least version 3.1 connects the corresponding MAX7317
pin directly to the modem. <br>
<br>
Assuming, that all hardware versions use the PWRKEY
procedure for powering, I streamlined the code and moved
the corresponding functions into separate files
(simcom_powering.cpp and simcom_powering.h). This avoids
the duplication of the code. <br>
<br>
All this leads to substantial changes in ovms_cellular
and ovms_cellular_modem_driver as well. <br>
<br>
The code works now perfectly for the 7670, but testing
is required for all other models. <br>
If my assumptions about the OVMS HW versions are not
correct, or the modems do not work as documented, some
modifications might be needed. <br>
<br>
GNSS Location <br>
============ <br>
The 7670 no longer accepts the currently used AT
commands to obtain the location as a GRMC sentence. So,
I added code to the new 7670 class to request the
location via the AT+CGNSSINFO command. <br>
Since this has to be send explicitly again and again, I
implemented a corresponding call in the StatusPoller of
the 7670. <br>
All the NMEA related code has been adapted to handle the
corresponding CGNSSINFO response. <br>
<br>
<br>
In conclusion, before doing a pull request, it would
make sense that the code is tested with the other
hardware and modem models. <br>
<br>
So, tell me what you think and if the general strategy
of the mods make sense to you. <br>
<br>
Best regards <br>
Christian <br>
<br>
<br>
<br>
<br>
<br>
<br>
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Michael Balzer * Am Rahmen 5 * D-58313 Herdecke
Fon 02330 9104094 * Handy 0176 20698926</pre>
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