Title Daikin Comfora FTXP - Serial communication on S21 port.pdf ✅

Daikin Comfora FTXP - Serial communication on S21 port (1:+5V, 2:Tx, 3: Rx, 4: +12V, 5: GND) Outside Temp during test around 0°C Cmd Hex penultimate byte - CheckSum8 Modulo 256 (Sum of Bytes % 256) 02 and 03 - start and stop packet Response Hex (example) First 4 byte and last one are static penultimate byte - CheckSum8 Modulo 256 (Sum of Bytes % 256) 06 02 and 03 - start and stop packet Meaning Behaviour at AC Off Behaviour at AC On Fan only Behaviour at AC On Heat Behaviour at AC On Cool Behaviour at AC On Dry 02 41 41 03 06 02 43 41 03 02 4D 4D 03 06 02 4D 46 46 46 46 65 03 xx 02 46 31 77 03 [1] 06 02 47 31 30 36 48 41 67 03 Something + fs(fan state like 53 47) 0 4 G (fs) 1 6 G (fs) 1 3 1 2 02 46 32 78 03 06 02 47 32 3D 3B 0 80 71 03 02 46 33 79 03 06 02 47 33 30 30 30 00 0A 03 Timer On: 0 0 0 - off, 1 6 0 - 1hr, 1 < 0 - 2hr, 1 B 0 - 3hr, 1 H 0 - 4hr, 1 N 0 - 5hr Timer Off: 0 0 0 - off, 2 0 6 - 1hr, 2 0 < - 2hr, 2 0 B - 3hr, 2 0 H - 4hr Timer On+Off: 3 6 6 - 1+1hr, 3 6 < - 1+2hr, 3 6 B - 1+3hr 02 46 34 7a 03 06 02 47 34 30 B0 80 30 0B 03 02 46 35 7b 03 06 02 47 35 30 30 30 80 8C 03 Swing: 0 0 0 - off, 1 ? 0 - up/down, 2 ? 0 - left/right, 7 ? 0 - all sides 02 46 36 7c 03 06 02 47 36 30 30 30 34 41 03 p 0 0 4 - p=comfort, 2 0 0 4 - powerful, 0 0 0 4 - comfort off 02 46 37 7d 03 06 02 47 37 30 30 48 46 6C 03 0 2 L-2=economy, 0 0 Z - powerful, 0 0 D - fan only 0 0 L L (y) 0 0 G (x) (y) 0 0 O 0 0 H 02 46 38 7e 03 06 02 47 38 30 32 30 30 41 03 02 46 39 7f 03 06 02 47 39 A8 8A FF 30 E1 03 � � � 0 � � � � 0 � 02 46 41 87 03 06 02 47 41 46 46 46 46 A0 03 new 02 46 42 88 03 06 02 47 42 30 34 34 30 51 03 new 02 46 43 89 03 06 02 47 43 42 37 30 31 64 03 new 02 46 47 8D 03 06 02 47 47 30 33 30 30 51 03 new 02 46 4B 91 03 06 02 47 4B 71 73 35 31 DC 03 new 02 46 4C 92 03 06 02 47 4C 30 30 30 30 53 03 new 02 46 4D 93 03 06 02 47 4D 44 36 31 30 6F 03 new 02 46 4E 94 03 06 02 47 4E 30 30 30 30 55 03 new 02 46 50 96 03 06 02 47 50 45 36 30 30 72 03 new 02 46 51 97 03 06 02 47 51 42 38 30 30 72 03 new 02 46 52 98 03 06 02 47 52 30 30 30 30 59 03 new 02 46 53 99 03 06 02 47 53 30 30 30 30 5A 03 new 02 46 54 9A 03 06 02 47 54 33 30 30 30 5E 03 new 02 46 56 9C 03 06 02 47 56 33 37 83 30 BA 03 new x x 02 52 41 93 03 06 02 53 41 30 C4 03 State? 0=off, 1=fan only, (1=On only ?) 0 1 1 02 52 42 94 03 06 02 53 42 36 CB 03 Some state? 4->6 4 ?? 6 4 3 2 02 52 43 95 03 06 02 53 43 32 32 30 2B 55 03 Some temp around 2°C 02 52 44 96 03 06 02 53 44 30 30 30 27 03 Timer On: 0 0 0 - off, 6 0 0 - 1hr, 2 1 0 - 2hr, 8 1 0 - 3hr, 4 2 0 - 4hr, 0 3 0 - 5hr 02 52 45 97 03 06 02 53 45 30 30 30 28 03 Timer Off: 0 0 0 - off, 6 0 0 - 1hr, 2 1 0 - 2hr, 8 1 0 - 3hr 02 52 46 98 03 06 02 53 46 30 30 F9 03 Swing: 0 0 - off, 1 F - up/down, 2 F - left/right, 7 F - all sides