More purifier fixes

content/Hacking my Air Purifier onto Wifi.md

@@ -61,17 +61,15 @@ Luckily I only blew a fuse on the board and just had to solder a new one on, par
 
 This showed me the hack was indeed possible, so I ordered a differential probe off Amazon in order to scope the signals precisely: 
 
-```
-- black (GND_S) floats 48 VAC above mains ground
-- green (CON3-3) is PWM 0-5 V, higher duty cycle for more speed
-- blue (CON3-2) is speed tach. 50% duty cycle, period widens as it gets slower
+- Pin 1 (+5V_1A, white) is pretty clean 5.3 V always
+- Pin 2 (SIG1) doesn't seem like anything
+- Pin 3 (CON3-2) is speed tach. 50% duty cycle, period widens as it gets slower
 	- low speed 80 Hz
 	- medium speed 119 Hz
 	- high speed 200 Hz
-- brown (SIG1) doesn't look like anything
-- white (15VON/OFF) is 1.5 V when machine is off, noisy 5.3 V when running
-- red (+5V_1A) is pretty clean 5.3 V always
-```
+- Pin 4 (CON3-3) is PWM 0-5 V, higher duty cycle for more speed
+- Pin 5 (GND_S) ground, floats 48 VAC above mains ground
+- Pin 6 (15VON/OFF) is 1.5 V when machine is off, noisy 5.3 V when running
 
 I wrote a quick Arduino sketch to see if the 0-3.3 V PWM it outputs was enough to control the speed and it was. This, combined with the fact there's 5 V supplied by the ribbon cable meant that the Arduino could be connected simply with three wires, without the need for level shifters or a power supply.