7 years ago.

Xdot unable to capture Downlink message

Hi all,

I am having an issue where I am able to receive the data from gateway, but I am unable to capture the data. Please look at the following code snippet and suggest what I might do in order to rectify the issue.

....

std::vector<uint8_t> tx_data,rx_data;

send_data(tx_data);

recv_data(rx_data);

debug.printf("vector size %d\n\r",rx_data.size());

vector<uint8_t>::const_iterator p1;

for (p1 = rx_data.begin(); p1 != rx_data.end(); p1++) {

debug.printf("debug char %c\n\r",*p1);

}

....

The output for rx_data.size is always 0 and for loop doesn't even loop because it sees an empty vector even though I see the string the gateway sent while calling recv_data function. See following

---

[INFO] Preparing frame

[INFO] Configure radio for TX

[INFO] Configure radio for TX

[INFO] Rx Window 1

[INFO] Rx Window 2

[INFO] RxDone 34 bytes RSSI: -101 dB SNR: 12 cB

[INFO] Packet for 12006d1a

[INFO] Packet Received : Port: 1 FCnt: 00000001 Size: 11 ACK: 0 DUP: 0

Rx data: ������"3DU [aabbccddeeff1122334455]

[INFO] Packet RSSI: -101 dB SNR: 12 cB

[INFO] successfully sent data to gateway

[INFO] successfully received data to gateway

vector size 0

---

recv_data looks like the following:

void recv_data(std::vector<uint8_t> data) {

uint32_t ret;

ret = dot->recv(data);

if (ret != mDot::MDOT_OK) {

logError("failed to receive data from %s [%d][%s]", dot->getJoinMode() == mDot::PEER_TO_PEER ? "peer" : "gateway", ret, mDot::getReturnCodeString(ret).c_str());

} else {

logInfo("successfully received data to %s", dot->getJoinMode() == mDot::PEER_TO_PEER ? "peer" : "gateway");

}

}

---

The string aabbccddeeff1122334455 is what I had sent and was assuming it would be captured in rx_data.

Any help would be appreciated.

Thank you