void sub_build_uhfmsg(ot_int* buffer) {
/// This is the routine that builds the DASH7 UDP generic protocol message.
/// The protocol has data elements marked by a letter (T, V, R, E, D) that
/// signify Temperature, Voltage, RSSI (LF), PaLFi wake Event, and RX Data.
/// The elements are fixed/known length.
command_tmpl c_tmpl;
ot_u8* data_start;
ot_u8 status;
// Broadcast request (takes no 2nd argument)
otapi_open_request(ADDR_broadcast, NULL);
// Insert Transport-Layer headers
c_tmpl.type = CMDTYPE_na2p_request;
c_tmpl.opcode = CMD_udp_on_file;
c_tmpl.extension= CMDEXT_no_response;
otapi_put_command_tmpl(&status, &c_tmpl);
otapi_put_dialog_tmpl(&status, NULL); // NULL = defaults
// UDP Header
q_writebyte(&txq, 255); // Source Port: 255 (custom application port)
q_writebyte(&txq, 255); // Destination Port (same value)
data_start = txq.putcursor;
// Place temperature data
q_writebyte(&txq, 'T');
q_writeshort(&txq, buffer[0]);
// Place Voltage data
q_writebyte(&txq, 'V');
q_writeshort(&txq, buffer[1]);
// Place RSSI data
q_writebyte(&txq, 'R');
q_writeshort(&txq, radio.last_rssi);
// Store this information into the Port 255 file for continuous, automated
// reporting by DASH7/OpenTag until it is updated next time. The length of
// this information is always 6 bytes.
{
vlFILE* fp;
fp = ISF_open_su(255);
if (fp != NULL) {
vl_store(fp, 6, data_start);
vl_close(fp);
}
}
// Finish Message
otapi_close_request();
}
void sub_build_uhfmsg(ot_int* buffer) {
/// This is the routine that builds the DASH7 UDP generic protocol message.
/// The protocol has data elements marked by a letter (T, V, R, E, D) that
/// signify Temperature, Voltage, RSSI (LF), PaLFi wake Event, and RX Data.
/// The elements are fixed/known length.
session_tmpl s_tmpl;
command_tmpl c_tmpl;
ot_u8* data_start;
ot_u8 status;
// Create a new session: you could change these parameters
// Use "CHAN1" for odd events, "CHAN2" for even events
s_tmpl.channel = (palfi.wake_event & 1) ? ALERT_CHAN1 : ALERT_CHAN2;
s_tmpl.subnetmask = 0; // Use default subnet
s_tmpl.flagmask = 0; // Use default app-flags
s_tmpl.timeout = 10; // Do CSMA for no more than 10 ticks (~10 ms)
otapi_new_session(&s_tmpl);
// Broadcast request (takes no 2nd argument)
otapi_open_request(ADDR_broadcast, NULL);
// Insert Transport-Layer headers
c_tmpl.type = CMDTYPE_na2p_request;
c_tmpl.opcode = CMD_udp_on_file;
c_tmpl.extension= CMDEXT_no_response;
otapi_put_command_tmpl(&status, &c_tmpl);
otapi_put_dialog_tmpl(&status, NULL); // NULL = defaults
// UDP Header
q_writebyte(&txq, 255); // Source Port: 255 (custom application port)
q_writebyte(&txq, 255); // Destination Port (same value)
data_start = txq.putcursor;
// Place temperature data
q_writebyte(&txq, 'T');
q_writeshort(&txq, buffer[0]);
// Place Voltage data
q_writebyte(&txq, 'V');
q_writeshort(&txq, buffer[1]);
// Place RSSI data
q_writebyte(&txq, 'R');
q_writestring(&txq, (ot_u8*)&palfi.rssi1, 3);
// Place Action data
q_writebyte(&txq, 'E');
q_writebyte(&txq, (ot_int)palfi.wake_event);
// Dump some received data
if (palfi.wake_event) {
q_writebyte(&txq, 'D');
q_writestring(&txq, palfi.rxdata, 8);
}
// Store this information into the Port 255 file for continuous, automated
// reporting by DASH7/OpenTag until it is updated next time. The length of
// this information is always 23 bytes.
{
vlFILE* fp;
fp = ISF_open_su(255);
if (fp != NULL) {
vl_store(fp, 23, data_start);
vl_close(fp);
}
}
// Finish Message
otapi_close_request();
}
