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weather: Generate location, sunrise, sunset data #186

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weather: Generate location, sunrise, sunset data #186

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25 changes: 23 additions & 2 deletions main.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -831,9 +831,15 @@ class Framework {
data[0] = val & 0xff;
data[1] = (val >> 8) & 0xff;
}
void write_uint16(std::span<uint8_t> data, uint16_t val)
{
assert(data.size() >= 2);
data[0] = val & 0xff;
data[1] = (val >> 8) & 0xff;
}
void set_current_weather(uint64_t timestamp, int16_t temperature, int iconId)
{
std::array<uint8_t, 49> dataBuffer {};
std::array<uint8_t, 53> dataBuffer {};
std::span<uint8_t> data(dataBuffer);
os_mbuf buffer;
ble_gatt_access_ctxt ctxt;
Expand All @@ -844,13 +850,28 @@ class Framework {
int16_t minTemperature = temperature;
int16_t maxTemperature = temperature;
dataBuffer.at(0) = 0; // MessageType::CurrentWeather
dataBuffer.at(1) = 0; // Vesion 0
dataBuffer.at(1) = 1; // Version 1 (includes sunrise/sunset)
write_uint64(data.subspan(2), timestamp);
write_int16(data.subspan(10), temperature);
write_int16(data.subspan(12), minTemperature);
write_int16(data.subspan(14), maxTemperature);

// Location (offset 16-47, 32 chars + null terminator)
const char* cities[] = {"San Francisco", "Chicago", "New York", "Toronto", "Montreal",
"London", "Paris", "Beijing", "Tokyo", "Sydney"};
const char* location = cities[rand() % 10];
strncpy(reinterpret_cast<char*>(&dataBuffer.at(16)), location, 32);
dataBuffer.at(47) = '\0'; // ensure null terminator

dataBuffer.at(48) = static_cast<uint8_t>(iconId);

// Sunrise/Sunset (Version 1 fields)
// Generate reasonable sunrise/sunset times
uint16_t sunrise = (6 * 60) + (rand() % 90); // 6-7:30am in minutes since midnight
uint16_t sunset = (17 * 60) + (30 + rand() % 90); // 5:30-7pm in minutes since midnight
write_uint16(data.subspan(49), sunrise);
write_uint16(data.subspan(51), sunset);

// send weather to SimpleWeatherService
systemTask.nimble().weather().OnCommand(&ctxt);
}
Expand Down