add test for ESP32

tutorials/http/http-server/arduino/esp32-http/mongoose_config.h

@@ -1,3 +1,5 @@
 #pragma once
 
+#include "Arduino.h"
+
 #define MG_ARCH MG_ARCH_ESP32

tutorials/mqtt/mqtt-client/arduino/nano-w5500-mqtt/mongoose.c

@@ -0,0 +1 @@
+../../../../../mongoose.c

tutorials/mqtt/mqtt-client/arduino/nano-w5500-mqtt/mongoose.h

@@ -0,0 +1 @@
+../../../../../mongoose.h

tutorials/mqtt/mqtt-client/arduino/nano-w5500-mqtt/mongoose_config.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include "Arduino.h"
+
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <time.h>
+
+#define MG_ARCH MG_ARCH_CUSTOM
+#define MG_ENABLE_TCPIP 1
+#define MG_ENABLE_DRIVER_W5500 1
+#define MG_ENABLE_TCPIP_DRIVER_INIT 0
+#define MG_ENABLE_TCPIP_PRINT_DEBUG_STATS 0
+#define MG_ENABLE_CUSTOM_MILLIS 1
+#define MG_ENABLE_CUSTOM_RANDOM 1
+#define MG_TLS MG_TLS_NONE // no room for TLS
+#define MG_IO_SIZE 128
+

tutorials/mqtt/mqtt-client/arduino/nano-w5500-mqtt/w5500-mqtt.ino

@@ -0,0 +1,103 @@
+#include <SPI.h>
+#include "mongoose.h"
+
+#define MQTT_SERVER "mqtt://broker.hivemq.com:1883"
+#define MQTT_SUB_TOPIC "mg/rx"  // Subscribe to this topic
+#define MQTT_PUB_TOPIC "mg/tx"  // Publish to this topic
+#define SS_PIN 2                // Slave select pin
+#define LED_PIN 21              // LED pin
+
+struct mg_connection *mqtt_connection;
+struct mg_tcpip_spi spi = {
+    NULL,  // SPI metadata
+    [](void *) { digitalWrite(SS_PIN, LOW); SPI.beginTransaction(SPISettings()); },
+    [](void *) { digitalWrite(SS_PIN, HIGH); SPI.endTransaction(); },
+    [](void *, uint8_t c) { return SPI.transfer(c); }, // Execute transaction
+};
+struct mg_mgr mgr;                                     // Mongoose event manager
+struct mg_tcpip_if mif = {.mac = {2, 0, 1, 2, 3, 5}};  // Network interface
+
+uint64_t mg_millis(void) {
+  return millis();
+}
+bool mg_random(void *buf, size_t len) {  // For TLS
+  uint8_t *p = (uint8_t *) buf;
+  while (len--) *p++ = (unsigned char) (rand() & 255);
+  return true;
+}
+
+void mqtt_publish(const char *message) {
+  struct mg_mqtt_opts opts = {};
+  opts.topic = mg_str(MQTT_PUB_TOPIC);
+  opts.message = mg_str(message);
+  if (mqtt_connection) mg_mqtt_pub(mqtt_connection, &opts);
+}
+
+// Crude function to get available RAM, for quick profiling
+size_t getFreeRAM(void) {
+  size_t size = 0, increment = 100;
+  void *p;
+  while ((p = malloc(size)) != NULL) free(p), size += increment;
+  return size;
+}
+
+// Implement LED control over MQTT: "on" and "off" commands
+void handle_command(struct mg_str msg) {
+  if (msg.len == 3 && memcmp(msg.buf, "off", 3) == 0) {
+    digitalWrite(LED_PIN, LOW);
+    mqtt_publish("done - off");
+  } else if (msg.len == 2 && memcmp(msg.buf, "on", 2) == 0) {
+    digitalWrite(LED_PIN, HIGH);
+    mqtt_publish("done - on");
+  }
+  MG_INFO(("Free RAM: %u bytes", getFreeRAM()));
+}
+
+static void mqtt_ev_handler(struct mg_connection *c, int ev, void *ev_data) {
+  if (ev == MG_EV_MQTT_OPEN) {
+    MG_INFO(("%lu CONNECTED to %s", c->id, MQTT_SERVER));
+    struct mg_mqtt_opts opts = {};
+    opts.topic = mg_str(MQTT_SUB_TOPIC);
+    mg_mqtt_sub(c, &opts);
+    MG_INFO(("%lu SUBSCRIBED to %s", c->id, MQTT_SUB_TOPIC));
+  } else if (ev == MG_EV_MQTT_MSG) {
+    // Received MQTT message
+    struct mg_mqtt_message *mm = (struct mg_mqtt_message *) ev_data;
+    MG_INFO(("%lu RECEIVED %.*s <- %.*s", c->id, (int) mm->data.len,
+             mm->data.buf, (int) mm->topic.len, mm->topic.buf));
+    handle_command(mm->data);
+  } else if (ev == MG_EV_CLOSE) {
+    MG_INFO(("%lu CLOSED", c->id));
+    mqtt_connection = NULL;
+  }
+}
+
+void reconnect_if_not_connected(void) {
+  if (mif.state == MG_TCPIP_STATE_READY && mqtt_connection == NULL) {
+    struct mg_mqtt_opts opts = {};
+    opts.clean = true;
+    mqtt_connection =
+        mg_mqtt_connect(&mgr, MQTT_SERVER, &opts, mqtt_ev_handler, NULL);
+  }
+}
+
+void setup() {
+  Serial.begin(115200);       // Initialise serial
+  while (!Serial) delay(50);  // for debug output
+
+  SPI.begin();                   // Iniitialise SPI
+  pinMode(SS_PIN, OUTPUT);       // to communicate with W5500 Ethernet module
+  pinMode(LED_PIN, OUTPUT);  // Initialise LED
+
+  mg_mgr_init(&mgr);        // Initialise Mongoose event manager
+  mg_log_set(MG_LL_DEBUG);  // Set debug log level
+  mg_log_set_fn([](char ch, void *) { Serial.print(ch); }, NULL);  // Log serial
+  mif.driver = &mg_tcpip_driver_w5500;  // Use W5500 built-in driver
+  mif.driver_data = &spi;               // Pass SPI interface to W5500 driver
+  mg_tcpip_init(&mgr, &mif);            // Initialise built-in TCP/IP stack
+}
+
+void loop() {
+  mg_mgr_poll(&mgr, 1);          // Process network events
+  reconnect_if_not_connected();  // Reconnect to MQTT server if needed
+}

tutorials/mqtt/mqtt-client/arduino/w5500-mqtt/mongoose_config.h

@@ -16,5 +16,5 @@
 #define MG_ENABLE_CUSTOM_MILLIS 1
 #define MG_ENABLE_CUSTOM_RANDOM 1
 // #define MG_TLS MG_TLS_BUILTIN
-#define MG_IO_SIZE 128
+#define MG_IO_SIZE 256