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#include "http/request.hpp"
#include "http/response_status.hpp"
#include "secrets.hpp"
#include "temperature.hpp"
#include "util.hpp"
#include "wifi_module.hpp"
#include <Arduino.h>
#include <SoftwareSerial.h>
#include <avr/pgmspace.h>
#include <string.h>
constexpr auto HTTP_PORT = 80U;
constexpr auto BAUDRATE = 9600U;
constexpr auto NETWORK_MODULE_RX_PIN = 13U;
constexpr auto NETWORK_MODULE_TX_PIN = 11U;
constexpr auto TEMPERATURE_SENSOR_PIN = 9U;
constexpr auto MILLIS_IN_SECOND = 1000U;
constexpr auto RESPONSE_DATA_MAX_LENGTH = 64U;
auto wifi_module = WiFiModule({ NETWORK_MODULE_RX_PIN, NETWORK_MODULE_TX_PIN });
auto temperature_sensor = TemperatureSensor(TEMPERATURE_SENSOR_PIN);
auto last_sent_response_time = 0UL;
void setup()
{
Serial.begin(BAUDRATE);
pinMode(NETWORK_MODULE_RX_PIN, INPUT);
pinMode(NETWORK_MODULE_TX_PIN, OUTPUT);
wifi_module.begin(BAUDRATE);
wifi_module.reset();
delay(MILLIS_IN_SECOND);
auto wifi_module_connected = wifi_module.test();
Serial.print(F("Wifi module connected: "));
Serial.println(wifi_module_connected ? F("Yes") : F("No"));
if (!wifi_module_connected)
{
util::quit();
}
wifi_module.set_echo_enabled(false);
delay(MILLIS_IN_SECOND);
const auto wifi_connect_success =
wifi_module.connect_to_wifi(WIFI_SSID, WIFI_PASSWORD);
Serial.print(
wifi_connect_success ? F("Connected to wifi network '")
: F("Failed to connect to wifi network '")
);
Serial.print(WIFI_SSID);
Serial.println("'");
if (!wifi_connect_success)
{
util::quit();
}
wifi_module.set_wifi_mode(WifiMode::Station);
delay(MILLIS_IN_SECOND * 3U);
char local_ip[MAX_NETWORK_MODULE_RESPONSE_LENGTH] = "";
Serial.print(F("IP address: "));
Serial.println(wifi_module.get_local_ip(local_ip));
wifi_module.set_multiple_connections_enabled(true);
delay(MILLIS_IN_SECOND);
wifi_module.create_tcp_server(HTTP_PORT);
}
void loop()
{
// Wait until a second has passed since the last sent response
while ((last_sent_response_time + MILLIS_IN_SECOND) > millis())
{
}
auto request = wifi_module.read_incoming_request();
auto connection = request.connection();
if (connection.id() == -1)
{
return;
}
Serial.print(F("Connection ID: "));
Serial.println(connection.id());
Serial.print(F("Request method: "));
Serial.println(http_request_method_strs[static_cast<size_t>(request.method())]);
Serial.print(F("Request HTTP version: "));
Serial.println(request.http_version());
Serial.print(F("Request path: "));
Serial.println(request.path());
const auto temperature_sensor_status = temperature_sensor.read_temperature();
const char *response_headers[] = { "Access-Control-Allow-Origin: *",
"Content-Type: application/json" };
const auto response_header_cnt =
sizeof(response_headers) / sizeof(response_headers[0]);
if (temperature_sensor_status != TemperatureSensorStatus::OK)
{
Serial.print(F("Error: "));
Serial.println(static_cast<int>(temperature_sensor_status));
wifi_module.send_response(
connection,
HTTP_RESPONSE_STATUS_INTERNAL_SERVER_ERROR,
response_headers,
response_header_cnt,
R"({"error": "Internal server error"})"
);
wifi_module.close_connection(connection);
return;
}
char response_data[RESPONSE_DATA_MAX_LENGTH] = "";
snprintf(
response_data,
RESPONSE_DATA_MAX_LENGTH,
"{ %s: { %s: %u} }",
R"("data")",
R"("temperature")",
temperature_sensor.temperature()
);
const auto send_response_ok = wifi_module.send_response(
connection,
HTTP_RESPONSE_STATUS_OK,
response_headers,
response_header_cnt,
response_data
);
if (!send_response_ok)
{
Serial.println(F("Failed to send response"));
wifi_module.close_connection(connection);
return;
}
last_sent_response_time = millis();
wifi_module.close_connection(connection);
}
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