espat: add support for esp8266/esp32 Wifi adaptor AT command set with net-compatible UDP support

Signed-off-by: Ron Evans <ron@hybridgroup.com>

espat/commands.go

@@ -0,0 +1,104 @@
+package espat
+
+// Basic AT commands
+const (
+	// Test that the device is working.
+	Test = ""
+
+	// Restart module
+	Restart = "+RST"
+
+	// Version show info about the current software version.
+	Version = "+GMR"
+
+	// Enter deep-sleep mode
+	Sleep = "+GSLP"
+
+	// Configure echo.
+	EchoConfig = "E"
+
+	// EchoConfigOn
+	EchoConfigOn = EchoConfig + "1"
+
+	// EchoConfigOff
+	EchoConfigOff = EchoConfig + "0"
+
+	// Configure UART
+	UARTConfig = "+UART"
+)
+
+// WiFi commands.
+const (
+	// WiFi mode (sta/AP/sta+AP)
+	WifiMode = "+CWMODE"
+
+	// Connect to an access point.
+	ConnectAP = "+CWJAP"
+
+	// List available AP's
+	ListAP = "+CWLAP"
+
+	// Disconnect from the current AP
+	Disconnect = "+CWQAP"
+
+	// Set softAP configuration. This also activates the ESP8266/ESP32 to act as an access point.
+	// The settings will not be saved in flash memory, so they will be forgotten on next reset.
+	SoftAPConfigCurrent = "+CWSAP_CUR"
+
+	// Set softAP configuration as saved in flash. This also activates the ESP8266/ESP32 to act as an
+	// access point. The settings will be saved in flash memory, so they will be used on next reset.
+	SoftAPConfigFlash = "+CWSAP_DEF"
+
+	// List station IP's connected to softAP
+	ListConnectedIP = "+CWLIF"
+
+	// Enable/disable DHCP
+	DHCPConfig = "+CWDHCP"
+
+	// Set MAC address of station
+	SetStationMACAddress = "+CIPSTAMAC"
+
+	// Set MAC address of softAP
+	SetAPMACAddress = "+CIPAPMAC"
+
+	// Set IP address of ESP8266/ESP32 station
+	SetStationIP = "+CIPSTA"
+
+	// Set IP address of ESP8266/ESP32 when acting as access point.
+	// The IP address will not be saved in flash memory, so it will be forgotten on next reset.
+	SetSoftAPIPCurrent = "+CIPAP_CUR"
+
+	// Set IP address of ESP8266/ESP32 when acting as access point.
+	// The IP address will be saved in flash memory, so they will be used on next reset.
+	SetSoftAPIPFlash = "+CIPAP_DEF"
+)
+
+// TCP/IP commands
+const (
+	// Get connection status
+	TCPStatus = "+CIPSTATUS"
+
+	// Establish TCP connection or register UDP port
+	TCPConnect = "+CIPSTART"
+
+	// Send Data
+	TCPSend = "+CIPSEND"
+
+	// Close TCP/UDP connection
+	TCPClose = "+CIPCLOSE"
+
+	// Get local IP address
+	GetLocalIP = "+CIFSR"
+
+	// Set multiple connections mode
+	TCPMultiple = "+CIPMUX"
+
+	// Configure as server
+	ServerConfig = "+CIPSERVER"
+
+	// Set transmission mode
+	TransmissionMode = "+CIPMODE"
+
+	// Set timeout when ESP8266/ESP32 runs as TCP server
+	SetServerTimeout = "+CIPSTO"
+)