AsyncUDP_Ethernet Library for ESP8266 boards using W5x00 / ENC28J60 Ethernet

Projects Libraries
1

AsyncUDP_Ethernet library GitHub release
How To Install Using Arduino Library Manager

Features

This AsyncUDP_Ethernet library is a fully asynchronous UDP library, designed for a trouble-free, multi-connection network environment, for ESP8266 boards using W5x00 or ENC28J60 Ethernet using lwIP_w5100, lwIP_w5500 or lwIP_enc28j60 library.

The library is easy to use and includes support for Unicast, Broadcast and Multicast environments.

This library is based on, modified from:

  1. Hristo Gochkov's ESPAsyncUDP

to apply the better and faster asynchronous feature of the powerful ESPAsyncUDP Library into ESP8266 boards using W5x00 or ENC28J60 Ethernet

Why Async is better

  • Using asynchronous network means that you can handle more than one connection at the same time
  • You are called once the request is ready and parsed
  • When you send the response, you are immediately ready to handle other connections while the server is taking care of sending the response in the background
  • Speed is OMG
  • After connecting to a UDP server as an Async Client, you are immediately ready to handle other connections while the Client is taking care of receiving the UDP responding packets in the background.
  • You are not required to check in a tight loop() the arrival of the UDP responding packets to process them.

Currently supported Boards

  1. ESP8266 boards using W5x00 or ENC28J60 Ethernet with lwIP_w5100, lwIP_w5500 or lwIP_enc28j60 library.

Changelog

Releases v1.2.1

  1. Initial porting and coding for ESP8266 using W5x00 or ENC28J60 Ethernet
  2. Bump up version to v1.2.1 to sync with AsyncUDP_STM32 v1.2.1

Debug Termimal Output Samples

1. AsyncUdpNTPClient on ESP8266_NODEMCU_ESP12E with ESP8266_W5500 Ethernet

This is terminal debug output when running AsyncUdpNTPClient on ESP8266_NODEMCU_ESP12E with ESP8266_W5500 Ethernet. It connects to NTP Server "0.ca.pool.ntp.org" (IPAddress(208, 81, 1, 244)) using AsyncUDP_Ethernet library, and requests NTP time every 60s. The packet is then received and processed asynchronously to print current UTC/GMT time.

Start AsyncUdpNTPClient on ESP8266_NODEMCU_ESP12E with ESP8266_W5500 Ethernet
AsyncUDP_Ethernet v1.2.1
Connecting to network : ..
Ethernet DHCP IP address: 192.168.2.188
UDP connected
============= createNTPpacket =============
Received UDP Packet Type: Unicast
From: 208.81.1.244:123, To: 192.168.2.188:56234, Length: 48
Seconds since Jan 1 1900 = 3858990229
Epoch/Unix time = 1650001429
The UTC/GMT time is Fri 2022-04-15 05:43:49 GMT
============= createNTPpacket =============
Received UDP Packet Type: Unicast
From: 208.81.1.244:123, To: 192.168.2.188:56234, Length: 48
Seconds since Jan 1 1900 = 3858990289
Epoch/Unix time = 1650001489
The UTC/GMT time is Fri 2022-04-15 05:44:49 GMT

2. AsyncUdpNTPClient on ESP8266_NODEMCU_ESP12E with ESP8266_ENC28J60 Ethernet

This is terminal debug output when running AsyncUdpNTPClient on ESP8266_NODEMCU_ESP12E with ESP8266_ENC28J60 Ethernet. It connects to NTP Server "0.ca.pool.ntp.org" (IPAddress(208, 81, 1, 244)) using AsyncUDP_Ethernet library, and requests NTP time every 60s. The packet is then received and processed asynchronously to print current UTC/GMT time.

Start AsyncUdpNTPClient on ESP8266_NODEMCU_ESP12E with ESP8266_W5500 Ethernet
AsyncUDP_Ethernet v1.2.1
Connecting to network : ..
Ethernet DHCP IP address: 192.168.2.188
UDP connected
============= createNTPpacket =============
Received UDP Packet Type: Unicast
From: 208.81.1.244:123, To: 192.168.2.188:56234, Length: 48
Seconds since Jan 1 1900 = 3858990229
Epoch/Unix time = 1650001429
The UTC/GMT time is Fri 2022-04-15 05:43:49 GMT
============= createNTPpacket =============
Received UDP Packet Type: Unicast
From: 208.81.1.244:123, To: 192.168.2.188:56234, Length: 48
Seconds since Jan 1 1900 = 3858990289
Epoch/Unix time = 1650001489
The UTC/GMT time is Fri 2022-04-15 05:44:49 GMT
2

shouldn't the existing esp8266 async libraries work with the lwip_* libraries?

3

I'm sure the original ESPAsyncxxx library will work with the lwIP_* libraries, but I'm planning to create these new Async*_Ethernet libraries for any other board (SAMD, Teensy, nRF52, STM32, etc), besides ESP8266, when the standard Ethernet W5x00/ENC28J60/etc. libraries are, in the near future, rewritten to be lwIP-based.

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