const uint8_t GPS::_message_PMREQ[] PROGMEM = {
    0x00, 0x00, // 4 bytes duration of request task
    0x00, 0x00, // (milliseconds)
    0x02, 0x00, // Task flag bitfield
    0x00, 0x00  // byte index 1 = sleep mode
};

const uint8_t GPS::_message_CFG_RXM_PSM[] PROGMEM = {
    0x08, // Reserved
    0x01  // Power save mode
};

const uint8_t GPS::_message_CFG_RXM_ECO[] PROGMEM = {
    0x08, // Reserved
    0x04  // eco mode
};

const uint8_t GPS::_message_CFG_PM2[] PROGMEM = {
    0x01, 0x06, 0x00, 0x00, // version, Reserved
    0x0e, 0x81, 0x42, 0x01, // flags
    0xE8, 0x03, 0x00, 0x00, // update period 1000 ms
    0x10, 0x27, 0x00, 0x00, // search period 10s
    0x00, 0x00, 0x00, 0x00, // Grod offset 0
    0x01, 0x00,             // onTime 1 second
    0x00, 0x00,             // min search time 0
    0x2C, 0x01,             // reserved
    0x00, 0x00, 0x4F, 0xC1, // reserved
    0x03, 0x00, 0x87, 0x02, // reserved
    0x00, 0x00, 0xFF, 0x00, // reserved
    0x01, 0x00, 0xD6, 0x4D  // reserved
};