firmware/src/modules/DropzoneModule.cpp

#if !MESHTASTIC_EXCLUDE_DROPZONE

#include "DropzoneModule.h"
#include "Meshservice->h"
#include "configuration.h"
#include "gps/GeoCoord.h"
#include "gps/RTC.h"
#include "main.h"

#include <assert.h>

#include "modules/Telemetry/Sensor/DFRobotLarkSensor.h"
#include "modules/Telemetry/UnitConversions.h"

#include <string>

DropzoneModule *dropzoneModule;

int32_t DropzoneModule::runOnce()
{
    // Send on a 5 second delay from receiving the matching request
    if (startSendConditions != 0 && (startSendConditions + 5000U) < millis()) {
        service->sendToMesh(sendConditions(), RX_SRC_LOCAL);
        startSendConditions = 0;
    }
    // Run every second to check if we need to send conditions
    return 1000;
}

ProcessMessage DropzoneModule::handleReceived(const meshtastic_MeshPacket &mp)
{
    auto &p = mp.decoded;
    char matchCompare[54];
    auto incomingMessage = reinterpret_cast<const char *>(p.payload.bytes);
    sprintf(matchCompare, "%s conditions", owner.short_name);
    if (strncasecmp(incomingMessage, matchCompare, strlen(matchCompare)) == 0) {
        LOG_DEBUG("Received dropzone conditions request");
        startSendConditions = millis();
    }

    sprintf(matchCompare, "%s conditions", owner.long_name);
    if (strncasecmp(incomingMessage, matchCompare, strlen(matchCompare)) == 0) {
        LOG_DEBUG("Received dropzone conditions request");
        startSendConditions = millis();
    }
    return ProcessMessage::CONTINUE;
}

meshtastic_MeshPacket *DropzoneModule::sendConditions()
{
    char replyStr[200];
    /*
        CLOSED @ {HH:MM:SS}z
        Wind 2 kts @ 125°
        29.25 inHg 72°C
    */
    uint32_t rtc_sec = getValidTime(RTCQuality::RTCQualityDevice, true);
    int hour = 0, min = 0, sec = 0;
    if (rtc_sec > 0) {
        long hms = rtc_sec % SEC_PER_DAY;
        hms = (hms + SEC_PER_DAY) % SEC_PER_DAY;

        graphics::decomposeTime(rtc_sec, hour, min, sec);
    }

    // Check if the dropzone is open or closed by reading the analog pin
    // If pin is connected to GND (below 100 should be lower than floating voltage),
    // the dropzone is open
    auto dropzoneStatus = analogRead(A1) < 100 ? "OPEN" : "CLOSED";
    auto reply = allocDataPacket();

    auto node = nodeDB->getMeshNode(nodeDB->getNodeNum());
    if (sensor.hasSensor()) {
        meshtastic_Telemetry telemetry = meshtastic_Telemetry_init_zero;
        sensor.getMetrics(&telemetry);
        auto windSpeed = UnitConversions::MetersPerSecondToKnots(telemetry.variant.environment_metrics.wind_speed);
        auto windDirection = telemetry.variant.environment_metrics.wind_direction;
        auto temp = telemetry.variant.environment_metrics.temperature;
        auto baro = UnitConversions::HectoPascalToInchesOfMercury(telemetry.variant.environment_metrics.barometric_pressure);
        sprintf(replyStr, "%s @ %02d:%02d:%02dz\nWind %.2f kts @ %d°\nBaro %.2f inHg %.2f°C", dropzoneStatus, hour, min, sec,
                windSpeed, windDirection, baro, temp);
    } else {
        LOG_ERROR("No sensor found");
        sprintf(replyStr, "%s @ %02d:%02d:%02d\nNo sensor found", dropzoneStatus, hour, min, sec);
    }
    LOG_DEBUG("Conditions reply: %s", replyStr);
    reply->decoded.payload.size = strlen(replyStr); // You must specify how many bytes are in the reply
    memcpy(reply->decoded.payload.bytes, replyStr, reply->decoded.payload.size);

    return reply;
}

#endif