ESP8266 / ESP8266NodeMCUInterface

ESP8266 driver using the NodeMCU interface

Dependencies:   BufferedSerial

Dependents:   esp8266_nodeMCU1 esp8266_2_thingspeak1 Solarator_0-0-2 IoTBurglar_and_Fire_AlarmSystem ... more

Fork of ESP8266Interface by ESP8266

This is an alternative implementation of the ESP8266 driver that uses the NodeMCU firmware. The NodeMCU firmware provides a slightly larger feature set than the default firmware through a Lua interpreter.

Note

This library is currently in Alpha. It is not feature complete and has some bugs, proceed with caution. Fixes and patches are welcome!

Interface changes

  • SSID and passphrase moved out of ESP8266Interface constructor and to ESP8266Interface::connect
  • ESP8266Interface constructor provides optional timeout parameter to specify how long to wait for network operations

Note

NodeMCU defaults to a baud rate of 9600 instead of 115200 used by the default firmware.

Firmware

To install the NodeMCU firmware, follow the instructions on the Firmware Update wiki page using the nodemcu_integer_0.9.6-dev_20150406.bin binary at address 0x00000 instead of boot_v1.1.bin and user1.bin.

Since the NodeMCU firmware defaults to a baud rate of 9600, the Serial Passthrough program can be used to get direct access to the Lua interpreter running on the ESP8266.

Status

Working features:

  • TCP Client
  • UDP Client Transmit (Currently only UDP Server can recieve messages)
  • Single Connection at a time
  • Station Mode (Connects to AP)
  • DNS Lookups

To be implemented:

  • TCP Server
  • UDP Server
  • UDP Client recieve
  • Multiple Connections tracked through Lua variables
  • AP Mode (Act as access point)
  • IPV6 support (Existing issue with NodeMCU)

Files at this revision

API Documentation at this revision

Revision 21:690526f05fe6, committed 2014-12-02

Comitter:
michaeljkoster
Date:
Tue Dec 02 04:16:26 2014 +0000
Parent:
20:d764237405c2
Child:
22:c4360e61486a
Commit message:
Fix recieveFrom loop to have 2 stage timeout in non-blocking case, return 0 bytes

Changed in this revision

Socket/Socket.cpp Show annotated file Show diff for this revision Revisions of this file
Socket/UDPSocket.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/Socket/Socket.cpp	Mon Dec 01 09:28:02 2014 +0000
+++ b/Socket/Socket.cpp	Tue Dec 02 04:16:26 2014 +0000
@@ -19,6 +19,8 @@
 #include "Socket.h"
 #include <cstring>
 
+extern Serial pc;
+
 Socket::Socket() : _blocking(true), _timeout(1500) {
     wifi = ESP8266::getInstance();
     if (wifi == NULL)
@@ -26,6 +28,7 @@
 }
 
 void Socket::set_blocking(bool blocking, unsigned int timeout) {
+    pc.printf("set blocking: %d %d\r\n", blocking, timeout);
     _blocking = blocking;
     _timeout = timeout;
 }

--- a/Socket/UDPSocket.cpp	Mon Dec 01 09:28:02 2014 +0000
+++ b/Socket/UDPSocket.cpp	Tue Dec 02 04:16:26 2014 +0000
@@ -76,9 +76,20 @@
                 break;
             }
         }
-        pc.printf("UDPsocket::receiveFrom: %d bytes\r\n", nb_available);
-   }
-
+    }
+    else {
+        tmr.start();
+        
+        while (time < _timeout){
+            nb_available = wifi->readable();
+            if (nb_available < 0) return nb_available;
+            if (nb_available > 0) break ;
+            time = tmr.read_ms();
+        }
+        
+        if (nb_available == 0) return nb_available;  
+    } 
+    
     tmr.start();
 
     while (time < _timeout) {