fixup! Initial UART HW flow control support

Author: Veijo Pesonen

ESP8266/ESP8266.cpp

@@ -75,6 +75,18 @@ int ESP8266::get_firmware_version()
     }
 }
 
+bool ESP8266::stop_uart_hw_flow_ctrl(void)
+{
+    // Stop board's flow control
+    _serial.set_flow_control(SerialBase::Disabled, _serial_rts, _serial_cts);
+
+    // Stop ESP8266's flow control
+    bool done = _parser.send("AT+UART_CUR=%u,8,1,0,0", ESP8266_DEFAULT_BAUD_RATE)
+        && _parser.recv("OK\n");
+
+    return done;
+}
+
 bool ESP8266::start_uart_hw_flow_ctrl(void)
 {
     bool done = true;

ESP8266/ESP8266.h

@@ -272,6 +272,13 @@ class ESP8266
      */
     bool start_uart_hw_flow_ctrl();
 
+    /**
+     * Stop board's and ESP8266's UART flow control
+     *
+     * @return true if started
+     */
+    bool stop_uart_hw_flow_ctrl();
+
     static const int8_t WIFIMODE_STATION = 1;
     static const int8_t WIFIMODE_SOFTAP = 2;
     static const int8_t WIFIMODE_STATION_SOFTAP = 3;

ESP8266Interface.cpp

@@ -267,12 +267,15 @@ bool ESP8266Interface::_disable_default_softap()
 nsapi_error_t ESP8266Interface::_init(void)
 {
     if (!_initialized) {
-        if (!_esp.start_uart_hw_flow_ctrl()) {
+        if (!_esp.stop_uart_hw_flow_ctrl()) {
             return NSAPI_ERROR_DEVICE_ERROR;
         }
         if (!_esp.reset()) {
             return NSAPI_ERROR_DEVICE_ERROR;
         }
+        if (!_esp.start_uart_hw_flow_ctrl()) {
+            return NSAPI_ERROR_DEVICE_ERROR;
+        }
         if (!_get_firmware_ok()) {
             return NSAPI_ERROR_DEVICE_ERROR;
         }