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Fix checksum validation #64

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Fix checksum validation #64

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6 changes: 5 additions & 1 deletion protocol/tagtinker_proto.c
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Original file line number Diff line number Diff line change
Expand Up @@ -322,7 +322,11 @@ void tagtinker_free_image_payload(TagTinkerImagePayload* payload) {

bool tagtinker_is_barcode_valid(const char* barcode) {
if(!barcode || strlen(barcode) != 17) return false;
return true;
int cs = 0;
for(int i = 0; i < 16; i++) {
cs += (unsigned char)barcode[i];
}
return (cs % 10) == (barcode[16] - '0');
}

size_t tagtinker_make_addressed_frame(uint8_t* buf, const uint8_t plid[4], const uint8_t* payload, size_t len) {
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