Look at that, from 9 seconds to just 340 milliseconds with ESP-NOW. So let’s do an experiment using the D1 Mini v3, as it was clearly the winner, but instead of connecting to a WiFi network and sending data over HTTP we are using the ESP-NOW protocol to send some info to a receiver: Wemos D1 Mini v3 power consumption while active and sending data over ESP-NOW It is important to note that all ESP boards support this protocol, including the ESP8266 and ESP32 (and of course all Wemos boards too). It allows communication between ESP devices and is much faster and less energy intensive. Which means it doesn’t matter what you do over WiFi later, connecting is expensive and slow.ĮSP-NOW is a protocol developed by Espressif that uses low power 2.4Ghz WiFi. Sending the HTTP request and waiting for a response is less than 300ms of those 9+ seconds. So you can clearly see that establishing the connection is the most expensive part by far.
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