error: pll_cal exceeds 2ms! wifi issue #9411
Description
Board
esp32c6
Device Description
dfrobot firebeetle 2
Hardware Configuration
this board has a waveshare display and is powered by a 2000mah battery
Version
latest development Release Candidate (RC-X)
IDE Name
Arduino IDE
Operating System
Windows 11
Flash frequency
80Mhz
PSRAM enabled
no
Upload speed
921600
Description
while operating on battery (as far as i know not happening while connected via usb) and waking up after deep-sleep mode (after a few hours of doing so), the device refuses to connect to any WiFI networks and prints this message into the Serial interface when booting: error: pll_cal exceeds 2ms!.
the board went to sleep and booted for about 5 days perfectly without fail and always connected to the internet afterwards, this issue started just yesterday, when i saw that the display had old data on it, when i plugged in my pc while on battery, i saw the message above and a constant reboot loop, because it cannot connect.
i have found out that the hardware reset button fixes this issue, but pressing this every time is not good enough, i have written code to reset the device via software, tried ESP.restart() that didn't work, abort() also without luck, next thing to try will be a cable connected with gpio to the rst button.
As of now i also don't know the exact time it takes for this problem to happen, but once it happens the device can only recover via hardware reset.
currently i also have not found any info on the internet, but i did find one that has the same board and problem as me here: esp8266/Arduino#2566 (comment)
i also opened a forum post on the dfrobot page here: https://www.dfrobot.com/forum/topic/334203
Sketch
setup
///
Serial.begin(115200);
analogReadResolution(12);
#ifdef DEVELOPMENT
delay(1000);
#endif
General::InitDevice()
////
RTC_DATA_ATTR unsigned long bootCount = 0;
RTC_DATA_ATTR unsigned long requestFails = 0;
void General::InitDevice() {
Serial.println("---------------------");
Serial.print("bootCount: ");
Serial.println(bootCount);
Serial.print("requestFails: ");
Serial.println(requestFails);
if (requestFails > 2) {
abort();
//ESP.restart();
}
Serial.println("Init Device");
preferences.begin(PROJECT, false);
++bootCount;
String uid = preferences.getString("uid", "");
if (uid.length() <= 0) {
uid = General::GenerateUUID();
preferences.putString("uid", uid);
}
Serial.print("uid: ");
Serial.println(uid);
String hostname = PROJECT + String("-") + uid.substring(0, 8); //project name + first 8 chars from uid
WiFiClass::setHostname(hostname.c_str());
Serial.print("SSID: ");
Serial.println(WIFI_SSID);
uint8_t wifiFails = 0;
WiFiClass::mode(WIFI_STA);
//WiFi.setAutoReconnect(true);
WiFi.begin(WIFI_SSID, WIFI_PASS);
while (WiFiClass::status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
if (wifiFails > 24) {
requestFails++;
General::PutToSleep();
}
wifiFails++;
}
Serial.println("Connected!")
///
void General::PutToSleep(unsigned long microSeconds) {
uptime += millis();
General::UpdateStatus(DeviceState::SLEEP);
//WiFi.setSleep(false);
WiFi.disconnect();
ESP.deepSleep(microSeconds);
}Debug Message
pll_cal exceeds 2ms!
pll_cal exceeds 2ms!
bootCount: 2
requestFails: 2
Init Device
uid: f5bf7243-f04c-49d6-ab3a-0d179fb352cc
SSID: -redacted-
......................
(gets put to sleep, wakes up after 2 sec and tries again,
after two tries it does abort(); and the cycle continues
)
Other Steps to Reproduce
No response
I have checked existing issues, online documentation and the Troubleshooting Guide
- I confirm I have checked existing issues, online documentation and Troubleshooting guide.