![]() Where high accuracy isn't required I would suggest to take a few samples and calculate the average interval error.Įxcel calculation screenshot int32_t deep_sleep_time_compensation = -145000000 // chip temperature dependant deep sleep duration error compensation in μsĮSP. Said temperature changes significantly once in deep sleep mode, calibration performed while the chip was active becomes useless mere moments after the chip has gone to sleep. Despite being named RTC, while it does keep a counter ticking while the module is sleeping, the accuracy with which it does so is highly dependent on the temperature of the chip. Time keeping on the ESP8266 is technically quite challenging. Using the internal RTC, improving meassurement of time passage during sleep apparently includes guessing at the sleeping chip's temperature: It connects to Wifi, MQTT, publishes some readings and status messages and go back to sleep. It is suggested using an external RTC if time tracking is of importance. ESP.deepSleep(0) It will wake up only on reset or restart. ESP32 - DeepSleep loop or not Ask Question Asked 2 years, 11 months ago Modified 2 years, 11 months ago Viewed 2k times 0 I'm trying to create a battery & solarpowered ESP32 for future use with sensors. If it can not be done with an ESP8266, might a ESP32 help? This is from PhpMyAdmin, in order to better visualize the problem: Serial.println("Going into deep sleep for 60 seconds") ĮSP.deepSleep(56e6) // because of microseconds - processing data takes about 4sec, but this is very unprecise This is a code sample of the DeepSleep algorithm: String JSON = "" Ĭlient.publish(topic, JSON.c_str(), true) //publish data as JSON to MQTTĭelay(10) //somehow if this is not added, the data does not get logged. In some cases (70 of the time), the current consumed is 17-19uA, so everything is fine If I unplug the +3.3V and plug it back, it stays in deepSleep mode, the current goes back to 17-19uA. Modem-sleep and Light-sleep are useful when you need to have ESP8266 module functioning while some of the functions shut down. When I call ESP.deepSleep(0) and I measure the current consumed my ESP8266, I get 2 different values. ![]() I need to reconnect after every wake-up and after every wake-up, the ESP8266 basically reboots.īecause this does not take exactly the same time on every wake-up, I wanted to know if there is a way to let the ESP8266 log on exactly the same timestamps and go to DeepSleep in between? Hardware: ESP-12-E Core Version: unknown. This used to work with my old sketch, where I had all data acquisition tasks in the loop section, and where I kept the connection to WiFi and the MQTT-Server open.īut this does not work with DeepSleep. Apparently, WAKERFCAL and WAKENORFCAL also result in WiFi working. Then connect to WiFi on the next wake (which should be in 1 second). Since I want to log the data, it would be good if I could send new entries every minute. Yes, you understood correctly after using ESP.deepSleep(n, WAKERFDISABLED) to disable WiFi, the most reliable method to re-enable it is to call ESP.deepSleep(1, WAKERFDEFAULT). Because I want to save some power, I decided to use DeepSleep. ![]() ![]() I have a ESP8266, which I use to log weather data over MQTT. ![]()
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