WifiEspNow
ESP-Now
WifiEspNow | ESP-Now | |
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1 | 9 | |
229 | 299 | |
- | 0.0% | |
3.6 | 0.0 | |
4 months ago | over 5 years ago | |
C++ | C++ | |
GNU General Public License v3.0 or later | - |
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WifiEspNow
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Help with grad project. Communication between 2 esps
There are examples in the Arduino ESP32 distribution. It should work the same on ESP8266. Or try this library: https://github.com/yoursunny/WifiEspNow
ESP-Now
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Not sure where to start, looking for points in the right direction
There's some other good tutorials for it as well, https://randomnerdtutorials.com/?s=esp-now and https://github.com/HarringayMakerSpace/ESP-Now
- Looking for a good reference for setting up multiple ESP8266's to collect temperature data
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Powering 16 ESP01s with servos
For power, I'd recommend Li-Ion primary (non-rechargeable) cells, whatever size works best for you. Those have essentially zero internal leakage and a 5 year shelf-life. If you've done it all correctly, it's conceivable it could be 5 years before you need to change the batteries (on top of a 30' ladder). You'd need a small high-efficiency buck converter to drop the 6.8V batteries down to 3.3V for the ESP, with a separate switched 5V linear regulator (one with a SHUTDOWN pin) to power the servos when they need to be driven. The ESP will consume 16-20uA in Deep Sleep, and the buck converter should mostly be off, except for when the ESP wakes every 3.5 hours (maximum Deep Sleep interval). If you're already using ESP-NOW to talk to the vent ESPs, then you could do a 'vent changed' check every time it wakes, otherwise it's more efficient to go back to Sleep quickly and wait until 12-24 hours has elapsed before you fire up a full WiFi connection. Not counting buck inefficiencies and servo movements, the ESP would only consume about 175mAh per year. The batteries will expire before they empty, maybe in 6-7 years.
- Help with grad project. Communication between 2 esps
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ESPNow to Wifi Gateway - part of an Ultra Low Power Sensor project
I presume you've seen Anthony Elder's examples? He got a single ESP to act as hub by restarting it. In a low-traffic environment that'd work. There was discussion and a new PR to speed up the reconnect time using WIFI_RESUME that's been merged in the git repo, which should make a single-ESP hub faster to respond. You'd need a little fault checking in case the BSSID changes of course, but for the normal case things would be faster.
- ESP NOW can't send Strings longer that 10 characters
- Battery powered WiFi button with ESP8266 - HTTP or MQTT?
- Lowest Possible Power (Wifi) for ESP 8266
- Can't measure esp's current. Please help!
What are some alternatives?
dscKeybusInterface - An Arduino/esp8266/esp32 library to directly interface with DSC security systems.
esphome - ESPHome is a system to control your ESP8266/ESP32 by simple yet powerful configuration files and control them remotely through Home Automation systems.
EnigmaIOT - Secure sensor and gateway platform based on ESP8266 and ESP32
Tasmota - Alternative firmware for ESP8266 and ESP32 based devices with easy configuration using webUI, OTA updates, automation using timers or rules, expandability and entirely local control over MQTT, HTTP, Serial or KNX. Full documentation at
ArduinoJson - 📟 JSON library for Arduino and embedded C++. Simple and efficient.
Farm-Data-Relay-System - A system that uses ESP-NOW, LoRa, and other protocols to transport sensor data in remote areas without relying on WiFi.
ESP-Now-Sensor-system-with-WiFi - ESP-Now is used for battery operated Sensors (based on ESP8266, ESP32) sending to a Gateway which also is connected with WiFi to the Internet (at the same time).
ultra-low-power-trigger-sensor-using-esp8266
IRremoteESP8266 - Infrared remote library for ESP8266/ESP32: send and receive infrared signals with multiple protocols. Based on: https://github.com/shirriff/Arduino-IRremote/
Home Assistant - :house_with_garden: Open source home automation that puts local control and privacy first.
openhab-distro - The binary distribution of openHAB
core - The internationalization (i18n) library for Angular