ESP8266 driver using the NodeMCU interface
Dependencies: BufferedSerial
Dependents: esp8266_nodeMCU1 esp8266_2_thingspeak1 Solarator_0-0-2 IoTBurglar_and_Fire_AlarmSystem ... more
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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)
Diff: Socket/UDPSocket.cpp
- Revision:
- 34:7ccda5d68a00
- Parent:
- 31:fd0eaf273b11
- Child:
- 38:86e75901efc1
- Child:
- 44:16da10e7b3f7
--- a/Socket/UDPSocket.cpp Thu Apr 30 21:09:14 2015 +0000 +++ b/Socket/UDPSocket.cpp Fri May 01 15:39:50 2015 +0000 @@ -47,8 +47,18 @@ Timer tmr; int idx = 0; + confEndpoint(remote); + // initialize transparent mode if not already done + if(!endpoint_configured) { + // initialize UDP (default id of -1 means transparent mode) + if(!wifi->start(ESP_UDP_TYPE, remote._ipAddress, remote._port, remote._id)) { + return(-1); + } + endpoint_configured = true; + } + tmr.start(); while ((tmr.read_ms() < _timeout) || _blocking) { @@ -68,13 +78,13 @@ int idx = 0; int nb_available = 0; int time = -1; - + //make this the non-blocking case and return if <= 0 // remember to change the config to blocking // if ( ! _blocking) { - // if ( wifi.readable <= 0 ) { - // return (wifi.readable); - // } + // if ( wifi.readable <= 0 ) { + // return (wifi.readable); + // } // } //--- tmr.start(); @@ -90,28 +100,28 @@ // blocking case else { tmr.reset(); - - while (time < _timeout){ + + 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; - } - + + if (nb_available == 0) return nb_available; + } + // change this to < 20 mS timeout per byte to detect end of packet gap // this may not work due to buffering at the UART interface tmr.reset(); // while ( tmr.read_ms() < 20 ) { - // if ( wifi.readable() && (idx < length) ) { - // buffer[idx++] = wifi->getc(); - // tmr.reset(); - // } - // if ( idx == length ) { - // break; - // } + // if ( wifi.readable() && (idx < length) ) { + // buffer[idx++] = wifi->getc(); + // tmr.reset(); + // } + // if ( idx == length ) { + // break; + // } // } //--- while (time < _timeout) {