Hi, I have an MKR WAN 1310 Board with GSM Antenna (850 Mhhz-1900Mhz) running on v1 MKRWAN firmware and Module Version is ARD-078 1.2.3. I have set up my Gateway TTIG that supports AS923Mhhz for Asia. LoRaWAN Specification 1.0.3 is used. Regional Parameters version is RP001 Regional Parameters 1.0.3 revision A.
I use LoraSendAndReceive, and I have no problems with Uplink.
However, I can never get Downlink messages to work as I always receive “No downlink message received at this time” after an Uplink message is sent.
I have gone through the WiKi and a number of posts in the forum but even after tinkering with my Rx1 Delay or such, I am still unable to receive it.
End Device Config
Simulating a Downlink
I use TTN Messaging console to send a Downlink message.
**Gateway General Settings > Basic Settings
Gateway General Settings > LoRaWAN Options
LoraSendAndReceive
#include <MKRWAN.h>
LoRaModem modem;
// Uncomment if using the Murata chip as a module
// LoRaModem modem(Serial1);
#include "arduino_secrets.h"
// Please enter your sensitive data in the Secret tab or arduino_secrets.h
String appEui = SECRET_APP_EUI;
String appKey = SECRET_APP_KEY;
void setup() {
Serial.begin(115200);
while (!Serial);
if (!modem.begin(AS923)) {
Serial.println("Failed to start module");
while (1) {}
};
Serial.print("Your module version is: ");
Serial.println(modem.version());
Serial.print("Your device EUI is: ");
Serial.println(modem.deviceEUI());
int connected = modem.joinOTAA(appEui, appKey);
if (!connected) {
Serial.println("Something went wrong; are you indoor? Move near a window and retry");
while (1) {}
}
// Set poll interval to 60 secs.
// modem.minPollInterval(60);
// NOTE: independent of this setting, the modem will
// not allow sending more than one message every 2 minutes,
// this is enforced by firmware and can not be changed.
}
void loop() {
Serial.println();
Serial.println("Enter a message to send to network");
Serial.println("(make sure that end-of-line 'NL' is enabled)");
while (!Serial.available());
String msg = Serial.readStringUntil('\n');
Serial.println();
Serial.print("Sending: " + msg + " - ");
for (unsigned int i = 0; i < msg.length(); i++) {
Serial.print(msg[i] >> 4, HEX);
Serial.print(msg[i] & 0xF, HEX);
Serial.print(" ");
}
Serial.println();
int err;
modem.beginPacket();
modem.print(msg);
err = modem.endPacket(true);
if (err > 0) {
Serial.println("Message sent correctly!");
} else {
Serial.println("Error sending message :(");
Serial.println("(you may send a limited amount of messages per minute, depending on the signal strength");
Serial.println("it may vary from 1 message every couple of seconds to 1 message every minute)");
}
delay(1000);
if (!modem.available()) {
Serial.println("No downlink message received at this time.");
return;
}
char rcv[64];
int i = 0;
while (modem.available()) {
Serial.print("try to receive this... ");
rcv[i++] = (char)modem.read();
}
Serial.print("Received: ");
for (unsigned int j = 0; j < i; j++) {
Serial.print(rcv[j] >> 4, HEX);
Serial.print(rcv[j] & 0xF, HEX);
Serial.print(" ");
}
Serial.println();
}
After scheduling a downlink, I see this in my End Device Live Data Console.
Then I send an Uplink message from the Board and I see this.
This is what is shown in the Gateway Live Data Console.
Can anyone help point out what I should focus on to get it to work?
