Progress! I was a little worried because I was measuring ~2 ohms between the antenna pin and ground but I tried it anyway and I have signal now. I saw crashes the first few times the cell network came up but it eventually settled down and is working now. Maybe an edge case in the dhcp code vs. first time network registration? FYI I'm running 3.2.016-377-g1e6da7e5 (for-v3.3 branch). Craig ------------------------------------------------------------- [initial boot/crash] OVMS> I (30972) cellular: State: Enter NetWait state I (30972) gsm-nmea: Startup OVMS> ena Password: I (31422) webserver: HTTP GET / I (31502) webserver: HTTP GET /assets/script.js I (31882) webserver: HTTP GET /apple-touch-icon.png I (32022) webserver: HTTP GET /cfg/cellular OVMS# I (35972) cellular: Network Registration status: DeniedRegistration I (36172) cellular: Signal Quality is: 24 (-65 dBm) OVMS# simcom Unrecognised command I (40322) cellular: Signal Quality is: 20 (-73 dBm) OVMS# cell MODEM Status Model: SIM7600 Network Registration: DeniedRegistration Provider: Signal: -73 dBm Mode: State: NetWait Mux: Status up PPP: Not running GPS: Connected on channel: #1 I (43042) cellular: Network Registration status: RegisteredRoaming I (43972) cellular: State: Enter NetStart state I (45032) cellular: PPP Connection is ready to start I (45972) cellular: State: Enter NetMode state I (45972) gsm-ppp: Initialising... OVMS# log level verbose cellular Logging level for cellular set to verbose OVMS# cell MODEM Status Model: SIM7600 Network Registration: RegisteredRoaming Provider: Signal: -73 dBm Mode: State: NetMode Mux: Status up PPP: Not connected GPS: Connected on channel: #1 D (52362) cellular: mux-rx-line #3: NO CARRIER D (52362) cellular: mux-rx-line #4: NO CARRIER D (52372) cellular: mux-rx-line #3: +PPPD: DISCONNECTED I (52372) cellular: PPP Connection disconnected D (52372) cellular: mux-rx-line #4: +PPPD: DISCONNECTED I (52372) cellular: PPP Connection disconnected OVMS# Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was un handled. Core 1 register dump: PC : 0x400fd4b8 PS : 0x00060830 A0 : 0x800fd5c5 A1 : 0x3f fca010 A2 : 0x3ffb5140 A3 : 0xa5a5a5a5 A4 : 0x3f488bd6 A5 : 0x3f fb5148 A6 : 0x00000073 A7 : 0x000000a5 A8 : 0x800fd481 A9 : 0x3f fc9ff0 A10 : 0x3ffca058 A11 : 0x3ffca050 A12 : 0x400f895c A13 : 0x00 000000 A14 : 0x3ffc91ac A15 : 0x00000001 SAR : 0x00000008 EXCCAUSE: 0x00 00001c EXCVADDR: 0xa5a5a663 LBEG : 0x4000c2e0 LEND : 0x4000c2f6 LCOUNT : 0xff ffffff ELF file SHA256: f80a889fca6f51ca Backtrace: 0x400fd4b8:0x3ffca010 0x400fd5c2:0x3ffca090 0x4022dfa9:0x3ffca0b0 Rebooting... ets Jul 29 2019 12:21:46 rst:0xc (SW_CPU_RESET),boot:0x1b (SPI_FAST_FLASH_BOOT) configsip: 0, SPIWP:0xee clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00 ------------------------------------------------------------- [decoded backtace] ice 485 % ./backtrace.sh 0x400fd4b8:0x3ffca010 0x400fd5c2:0x3ffca090 0x4022dfa9:0x3ffca0b0 + xtensa-esp32-elf-addr2line -e build/ovms3.elf 0x400fd4b8:0x3ffca010 0x400fd5c2:0x3ffca090 0x4022dfa9:0x3ffca0b0 main/ovms_notify.cpp:739 main/ovms_notify.cpp:739 /home/ice/u0/leres/esp/openvehicles-xtensa-esp32-elf/components/lwip/lwip/src/core/ipv4/dhcp.c:916 ------------------------------------------------------------- [later successful boot/network registration] OVMS# cell MODEM Status Model: SIM7600 Network Registration: RegisteredRoaming Provider: T-Mobile Hologram Signal: -73 dBm Mode: LTE,Online State: NetMode Mux: Status up PPP: Connected on channel: #2 GPS: Connected on channel: #1 D (174995) cellular: mux-tx #3: AT+CREG?;+CCLK?;+CSQ;+CPSI?;+COPS? D (175015) cellular: mux-rx-line #3: +CPSI: LTE,Online,310-260,0x417B,23125765,176,EUTRAN-BAND12,5035,2,2,-132,-1012,-741,9 D (175015) cellular: mux-rx-line #3: +CREG: 1,5 D (175015) cellular: mux-rx-line #3: +CCLK: "21/09/05,20:29:00-28" D (175015) cellular: mux-rx-line #3: +CSQ: 20,99 D (175015) cellular: mux-rx-line #3: +COPS: 0,0,"T-Mobile Hologram",7