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diff --git a/lora_pkt_fwd/src/lora_pkt_fwd.c b/lora_pkt_fwd/src/lora_pkt_fwd.c
index 801f28d..7c94308 100644
--- a/lora_pkt_fwd/src/lora_pkt_fwd.c
+++ b/lora_pkt_fwd/src/lora_pkt_fwd.c
@@ -1536,6 +1556,41 @@ void thread_up(void) {
memcpy((void *)(buff_up + buff_index), (void *)"{\"rxpk\":[", 9);
buff_index += 9;
+ if (nb_pkt > 1) {
+ uint32_t check_addr = 0;
+ uint16_t check_fcnt = 0;
+ float check_snr = -30.0;
+
+ for (i=0; i < nb_pkt; ++i) {
+ p = &rxpkt[i];
+ check_addr = p->payload[1];
+ check_addr |= p->payload[2] << 8;
+ check_addr |= p->payload[3] << 16;
+ check_addr |= p->payload[4] << 24;
+
+ check_fcnt = p->payload[6];
+ check_fcnt |= p->payload[7] << 8;
+
+ check_snr = p->snr;
+
+ for (j=0; j < nb_pkt; ++j) {
+ p = &rxpkt[j];
+ mote_addr = p->payload[1];
+ mote_addr |= p->payload[2] << 8;
+ mote_addr |= p->payload[3] << 16;
+ mote_addr |= p->payload[4] << 24;
+
+ mote_fcnt = p->payload[6];
+ mote_fcnt |= p->payload[7] << 8;
+
+ if (check_addr == mote_addr && check_fcnt == mote_fcnt && p->snr < check_snr) {
+ // set status of duplicate packets rx'd on wrong channel
+ p->status = 1;
+ }
+ }
+ }
+ }
+
/* serialize Lora packets metadata and payload */
pkt_in_dgram = 0;
for (i=0; i < nb_pkt; ++i) {
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