Hi, I let my ovms run on GSM for a while and it's not very stable. I'm not sure if wifi is better or worse but here's a log starting from a reboot with the button, connecting, disconnecting and crashing. My esp-idf looks up to date: commit 88ab5d4830e2eeb24fbae1d5f7d66a2e33bdbde0 Author: Stephen Casner <casner@acm.org> Date: Sun Oct 22 00:25:10 2017 -0700 Welcome to the Open Vehicle Monitoring System (OVMS) - Async Console I (605) simcom: State: Enter PoweringOn state I (605) simcom: Power Cycle D (1485) SIMCOM tx: 41 54 0d 0a AT.. D (1495) SIMCOM rx: 41 54 0d AT. I (1495) simcom: State: Enter PoweredOn state D (1495) SIMCOM rx: 0d 0a 4f 4b 0d 0a ..OK.. D (1505) SIMCOM line: 4f 4b OK Launching OVMS Server V2 connection (oscv2) Logging level for * set to debug Power mode of simcom is now on OVMS > level info Logging level for * set to info I (11485) simcom: State timeout, transition to 2 I (11485) simcom: State: Enter PoweringOn state I (11485) simcom: Power Cycle I (17475) simcom: State: Enter PoweredOn state I (36485) simcom: State: Enter MuxStart state I (36485) gsm-mux: Start MUX I (36495) gsm-mux: Channel #0 is open I (36505) gsm-mux: Channel #1 is open I (36505) gsm-mux: Channel #2 is open I (36515) gsm-mux: Channel #3 is open I (36515) gsm-mux: Channel #4 is open I (37485) simcom: State: Enter NetWait state I (47525) simcom: CREG Network Registration: RegisteredRoaming I (48485) simcom: State: Enter NetStart state I (49555) simcom: PPP Connection is ready to start I (50485) simcom: State: Enter NetMode state I (50485) gsm-ppp: Initialising... I (77405) gsm-ppp: StatusCallBack: None I (77405) gsm-ppp: status_cb: Connected I (77405) gsm-ppp: our_ipaddr = 10.170.199.15 I (77405) gsm-ppp: his_ipaddr = 10.64.64.64 I (77405) gsm-ppp: netmask = 255.255.255.255 I (77405) gsm-ppp: our6_ipaddr = :: I (80505) ovms-server-v2: Status: Network connectivity established I (80505) ovms-server-v2: Connection is redacted I (81905) ovms-server-v2: Connected to OVMS Server V2 at ovms.dexters-web.de I (81905) ovms-server-v2: Status: Connected to server I (81905) ovms-server-v2: Status: Logging in... I (81905) ovms-server-v2: Sending server login: MP-C 0 redacted I (101915) ovms-server-v2: Server response is incomplete (0 bytes) E (101915) ovms-server-v2: Status: Error: Server response is incomplete I (107445) simcom: CREG Network Registration: Searching I (107485) simcom: Lost network connection (NetworkRegistration in NetMode) I (107485) simcom: State: Enter NetLoss staGuru Meditation Error of type LoadProhibited occurred on core 0. Exception was unhandled. Register dump: PC : 0x40180151 PS : 0x00060830 A0 : 0x80180192 A1 : 0x3ffcf080 0x40180151: ip4_route at /home/ubuntu/esp/esp-idf/components/lwip/core/ipv4/ip4.c:250 (discriminator 2) A2 : 0x0000f01d A3 : 0x00000000 A4 : 0x3ffeae94 A5 : 0x3f429c7c A6 : 0x3ffd18c0 A7 : 0x00000000 A8 : 0x80180145 A9 : 0x3ffcf060 A10 : 0x00000000 A11 : 0x00000000 A12 : 0x3ffdcd3c A13 : 0x3ffc09a0 A14 : 0x00000003 A15 : 0x00060023 SAR : 0x00000010 EXCCAUSE: 0x0000001c EXCVADDR: 0x0000f0d2 LBEG : 0x4000c2e0 LEND : 0x4000c2f6 LCOUNT : 0xffffffff Backtrace: 0x40180151:0x3ffcf080 0x4018018f:0x3ffcf0a0 0x4017e37e:0x3ffcf0c0 0x401789f3:0x3ffcf100 0x40178a15:0x3ffcf130 0x40178ab6:0x3ffcf150 0x40178f14:0x3ffcf170 0x4017c64e:0x3ffcf190 0x4017c68f:0x3ffcf1b0 0x401850b9:0x3ffcf1d0 0x4018547d:0x3ffcf1f0 0x401854c4:0x3ffcf210 0x401898d5:0x3ffcf230 0x401853b4:0x3ffcf250 0x4018cdaa:0x3ffcf270 0x4018cde6:0x3ffcf290 0x401884b9:0x3ffcf2b0 0x401898d5:0x3ffcf2d0 0x401893fc:0x3ffcf2f0 0x40184fa1:0x3ffcf310 0x401a2aac:0x3ffcf330 0x40173589:0x3ffcf350 0x40180151: ip4_route at /home/ubuntu/esp/esp-idf/components/lwip/core/ipv4/ip4.c:250 (discriminator 2) 0x4018018f: ip4_route_src at /home/ubuntu/esp/esp-idf/components/lwip/core/ipv4/ip4.c:159 0x4017e37e: tcp_rst at /home/ubuntu/esp/esp-idf/components/lwip/core/tcp_out.c:1336 (discriminator 4) 0x401789f3: tcp_abandon at /home/ubuntu/esp/esp-idf/components/lwip/core/tcp.c:1630 0x40178a15: tcp_abort at /home/ubuntu/esp/esp-idf/components/lwip/core/tcp.c:1630 0x40178ab6: tcp_netif_ipv4_addr_changed_pcblist at /home/ubuntu/esp/esp-idf/components/lwip/core/tcp.c:1630 0x40178f14: tcp_netif_ipv4_addr_changed at /home/ubuntu/esp/esp-idf/components/lwip/core/tcp.c:1947 0x4017c64e: netif_set_ipaddr at /home/ubuntu/esp/esp-idf/components/lwip/core/netif.c:452 0x4017c68f: netif_set_addr at /home/ubuntu/esp/esp-idf/components/lwip/core/netif.c:330 0x401850b9: cifaddr at /home/ubuntu/esp/esp-idf/components/lwip/netif/ppp/ppp.c:704 0x4018547d: ipcp_clear_addrs at /home/ubuntu/esp/esp-idf/components/lwip/netif/ppp/ipcp.c:2192 0x401854c4: ipcp_down at /home/ubuntu/esp/esp-idf/components/lwip/netif/ppp/ipcp.c:2156 0x401898d5: fsm_lowerdown at /home/ubuntu/esp/esp-idf/components/lwip/netif/ppp/fsm.c:146 0x401853b4: ipcp_lowerdown at /home/ubuntu/esp/esp-idf/components/lwip/netif/ppp/ipcp.c:687 0x4018cdaa: upper_layers_down at /home/ubuntu/esp/esp-idf/components/lwip/netif/ppp/auth.c:715 0x4018cde6: link_down at /home/ubuntu/esp/esp-idf/components/lwip/netif/ppp/auth.c:701 0x401884b9: lcp_down at /home/ubuntu/esp/esp-idf/components/lwip/netif/ppp/lcp.c:2341 0x401898d5: fsm_lowerdown at /home/ubuntu/esp/esp-idf/components/lwip/netif/ppp/fsm.c:146 0x401893fc: lcp_lowerdown at /home/ubuntu/esp/esp-idf/components/lwip/netif/ppp/lcp.c:485 0x40184fa1: ppp_close at /home/ubuntu/esp/esp-idf/components/lwip/netif/ppp/ppp.c:704 0x401a2aac: pppapi_do_ppp_close at /home/ubuntu/esp/esp-idf/components/lwip/api/pppapi.c:355 0x40173589: tcpip_thread at /home/ubuntu/esp/esp-idf/components/lwip/api/tcpip.c:474 Rebooting... ets Jun 8 2016 00:22:57 rst:0xc (SW_CPU_RESET),boot:0x1f (SPI_FAST_FLASH_BOOT) configsip: 156795334, SPIWP:0x00 clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00 mode:DIO, clock div:2 load:0x3fff0008,len:8 load:0x3fff0010,len:4392 load:0x40078000,len:11080 load:0x40080000,len:252 0x40080000: _WindowOverflow4 at ??:? entry 0x40080034 0x40080034: _WindowOverflow4 at ??:? I (46) boot: ESP-IDF v2.1-20-g88ab5d4 2nd stage bootloader I (46) boot: compile time 11:13:21 I (79) boot: Enabling RNG early entropy source...