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bootrino/gist:06b821fb65b7aaad020c3ba532097a4c

Created February 10, 2019 21:00
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Print uint32_t as hex in Arduino
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gistfile1.txt
unsigned char bytes[4];
bytes[0] = (u32 >> 24) & 0xFF;
bytes[1] = (u32 >> 16) & 0xFF;
bytes[2] = (u32 >> 8) & 0xFF;
bytes[3] = u32 & 0xFF;
for(int i = 0; i < 4; i++)
{
if (i == 0) Serial.print("0x");
Serial.print(bytes[i], HEX);
if (i < 3) Serial.print(":");
if (i == 3) Serial.print("\n");
}
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