Description
Hardware:
Board: Sparkfun dev board, DOIT kit
Core Installation/update date: 10 Nov 2017
IDE name: Arduino IDE
Flash Frequency: 80Mhz
Upload Speed: 115200, 921600
libraries
- pubsubclient: 2.6.0 (current)
- esp32 commit 80a7d60 from Nov 10 2017, verified it includes the larger memory/stack size
Description:
X509 certificate connections crash the board with InstrFetchProhibited (sparkfun) or IllegalInstruction (DOIT). It seems maybe this is a cross-core communication issue, given that wifi is on core0 and the code runs on core1?
I'm not confident with opening this here nor in Pubsubclient, but I think it fits here much better.
I don't think it's a WDT issue, based on the trace.
Noting #657, as shown in the commit above it isn't the small mem/stack issue in there, also noting pubsubclient #84. Both are similar but I don't think they have the same root cause.
Sketch:
Snippet. I can give a full example if it helps.
espClient.setCertificate(__9a4_public_bin_key);
espClient.setPrivateKey(__9a4private_bin_key);
client.setServer(mqtt_server, 8883);
while (!client.connected()) {
Serial.println("Attempting MQTT connection...");
// Create a random client ID
String clientId = "ESP32Client-";
clientId += String(random(0xffff), HEX);
Serial.print("clientid: ");
Serial.println(clientId.c_str());
// Attempt to connect
if (client.connect(clientId.c_str())) { // crashes here (this is line 65)
Debug Messages:
Sparkfun doesn't have the debug menu, but the DOIT does. However I didn't see any more debugging in the logs even with "core debug level=debug".
errors
first, the decoded exception:
Decoding 8 results
0x400d2120: PubSubClient::readPacket(unsigned char*) at /Users/ted/Documents/Arduino/libraries/pubsubclientdiegopx/src/PubSubClient.cpp line 706
0x400d23a8: PubSubClient::connect(char const*, char const*, char const*, char const*, unsigned char, bool, char const*) at /Users/ted/Documents/Arduino/libraries/pubsubclientdiegopx/src/PubSubClient.cpp line 706
0x400d2436: PubSubClient::connect(char const*) at /Users/ted/Documents/Arduino/libraries/pubsubclientdiegopx/src/PubSubClient.cpp line 706
0x400d1e8b: reconnect() at /Users/ted/Documents/Arduino/esp32_mqtt/esp32_mqtt.ino line 65
0x400d1feb: loop() at /Users/ted/Documents/Arduino/esp32_mqtt/esp32_mqtt.ino line 151
0x40134e5c: loopTask(void*) at /Applications/Arduino_183.app/Contents/Java/hardware/espressif/esp32/cores/esp32/main.cpp line 18 (discriminator 1)
and the guru exception:
Guru Meditation Error of type InstrFetchProhibited occurred on core 1. Exception was unhandled.
Register dump:
PC : 0x0d2dfc40 PS : 0x00060430 A0 : 0x800d2123 A1 : 0x3ffd5c10
A2 : 0x3ffc32e8 A3 : 0x3ffd5c32 A4 : 0x0d2dfc40 A5 : 0x000031af
A6 : 0x3f401079 A7 : 0x3f401c03 A8 : 0x800d20c9 A9 : 0x3ffd5bf0
A10 : 0x3ffc33a4 A11 : 0x3ffc32ec A12 : 0xffff877f A13 : 0x000031af
A14 : 0x3f401079 A15 : 0x0000001d SAR : 0x00000008 EXCCAUSE: 0x00000014
EXCVADDR: 0x0d2dfc40 LBEG : 0x4000c46c LEND : 0x4000c477 LCOUNT : 0x00000000
Backtrace: 0x0d2dfc40:0x3ffd5c10 0x400d2120:0x3ffd5c30 0x400d23a8:0x3ffd5c70 0x400d2436:0x3ffd5cb0 0x400d1e8b:0x3ffd5ce0 0x400d1feb:0x3ffd5d20 0x40134e5c:0x3ffd5d60