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arduino-cli/libraries/painlessMesh-master/examples/bridge/bridge.ino

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+//************************************************************
+// this is a simple example that uses the painlessMesh library to 
+// connect to a node on another network. Please see the WIKI on gitlab
+// for more details
+// https://gitlab.com/painlessMesh/painlessMesh/wikis/bridge-between-mesh-and-another-network
+//************************************************************
+#include "painlessMesh.h"
+
+#define   MESH_PREFIX     "whateverYouLike"
+#define   MESH_PASSWORD   "somethingSneaky"
+#define   MESH_PORT       5555
+
+#define   STATION_SSID     "mySSID"
+#define   STATION_PASSWORD "myPASSWORD"
+#define   STATION_PORT     5555
+uint8_t   station_ip[4] =  {192,168,1,128}; // IP of the server
+
+// prototypes
+void receivedCallback( uint32_t from, String &msg );
+
+painlessMesh  mesh;
+
+void setup() {
+  Serial.begin(115200);
+  mesh.setDebugMsgTypes( ERROR | STARTUP | CONNECTION );  // set before init() so that you can see startup messages
+
+
+  // Channel set to 6. Make sure to use the same channel for your mesh and for you other
+  // network (STATION_SSID)
+  mesh.init( MESH_PREFIX, MESH_PASSWORD, MESH_PORT, WIFI_AP_STA, 6 );
+  // Setup over the air update support
+  mesh.initOTA("bridge");
+
+  mesh.stationManual(STATION_SSID, STATION_PASSWORD, STATION_PORT, station_ip);
+  // Bridge node, should (in most cases) be a root node. See [the wiki](https://gitlab.com/painlessMesh/painlessMesh/wikis/Possible-challenges-in-mesh-formation) for some background
+  mesh.setRoot(true);
+  // This node and all other nodes should ideally know the mesh contains a root, so call this on all nodes
+  mesh.setContainsRoot(true);
+
+
+  mesh.onReceive(&receivedCallback);
+}
+
+void loop() {
+  mesh.update();
+}
+
+void receivedCallback( uint32_t from, String &msg ) {
+  Serial.printf("bridge: Received from %u msg=%s\n", from, msg.c_str());
+}

arduino-cli/libraries/painlessMesh-master/examples/bridge/platformio.ini

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+[platformio]
+src_dir = .
+lib_extra_dirs = .piolibdeps/, ../../
+
+[env:nodemcuv2]
+platform = espressif8266
+board = nodemcuv2
+framework = arduino
+lib_deps = 
+    ArduinoJson
+    ESPAsyncTCP
+
+[env:esp32]
+platform = espressif32
+board = esp32dev
+framework = arduino
+lib_deps = ArduinoJson
+    TaskScheduler
+    AsyncTCP