PC IoT Command — Pulse Counters

The PC command configures high-speed pulse counters for IoT devices. It includes 2 counters (PC00-PC01) that count pulses on falling edge.

What is it for?

📏 Odometer — Counts speedometer pulses to calculate distance
⛽ Fuel flow — Integrates flow meter pulses
⚙️ Revolutions — Counts engine or shaft rotations
🔢 Scale factor — Converts pulses to real units (km, liters)

Description

PC counters use OW0 and OW1 ports to count high-speed falling edge pulses.

Syntax

Response

RPCaa,dddddd.ddd,bbbbbb.bbb

Examples

Query initial value

>QPC00<
>RPC00,000000.000,000000.000;ID=1234;*61<
// Counter at 0, factor at 0 (disabled)

Configure scale factor to 1

>SPC00K1<
>RPC00,000000.000,000001.000;ID=1234;*60<
// Factor = 1.000 → each pulse = 1 unit

After 54 pulses

>QPC00<
>RPC00,000054.000,000001.000;ID=1234;*61<
// 54 pulses counted ✅

Change factor to 10 (multiplies the value)

>SPC00K10<
>RPC00,000540.000,000010.000;ID=1234;*61<
// Same number of pulses, now shows 540

Configure factor to 500 (for odometer)

>SPC00K500<
>RPC00,027000.000,000500.000;ID=1234;*61<
// Example: 54 pulses × 500 = 27000 meters

Reset counter to 0

>SPC00R<
>RPC00,000000.000,000500.000;ID=1234;*64<
// Counter reset, factor remains

Compatibility