GPS NEO-7M Demo

Source: gps_neo7m_demo.ino
Prerequisites: NEO-7M module + TinyGPSPlus.
Shows: GPS parsing, coordinate payload encoding, periodic chain updates.

Code


int64_t latE7 = (int64_t)(gps.location.lat() * 10000000.0);
int64_t lngE7 = (int64_t)(gps.location.lng() * 10000000.0);
int64_t sats = gps.satellites.isValid() ? (int64_t)gps.satellites.value() : 0;
 
Instruction ix;
ix.setProgram(programId);
ix.addKey(authorityPub, true, true);
ix.addKey(dataAccountPda, false, true);
ix.writeBytes(RECORD_DATA_DISCRIMINATOR, 8);
ix.writeI64LE(latE7);
ix.writeI64LE(lngE7);
ix.writeI64LE(sats);