EStim Systems 2B

Serial Communication

Cable Details

Rather than using an RS-232 cable, the 2B uses a TTL cable for serial communication. This means you cannot use a regular USB-to-Serial converter, as the voltage levels will be incorrect. Instead, you need a cable that goes from USB to TRS connector with TTL voltages, like the FTDI TTL-232R-5V-AJ.

To wire your own cable, use the following connections between the TTL serial chip and TRS connector:

  • Tip <-> TX
  • Ring <-> RX
  • Sleeve <-> GND

Port Settings

The 2B uses 9600/8/N/1 for port settings.

Protocol

Structure

Commands are sent as ASCII, delimited by either a '\r' (0x0D) or by filling up the 5 character serial buffer of the 2B.

All commands will receive a reply of the same format

AAA:BB:CC:DD:EE:F:G:H:II
  • AAA - Battery Level
  • BB - Channel A Level
  • CC - Channel B Level
  • DD - Channel C Setting
  • EE - Channel D Setting
  • F - Current Mode
  • G - Power Setting (L or H)
  • H - Channel A/B Joined? (0 or 1)
  • II - Firmware Version

Commands

Command Description
Axx Sets Channel A Power % to xx. Range is 0 to 100, i.e. A50 sets Channel A to 50%
Bxx Sets Channel B Power % to xx. Range is 0 to 100
Cxx Sets Channel C Setting to xx. Range is 2 to 100
Dxx Sets Channel D Setting to xx. Range is 2 to 100
E Set all Channels to defaults (A/B: 0%, C/D: 50, Mode: Pulse)
H Switch to High Power Mode, turns A/B back to 0%
J Join Channels A/B. A is master.
K Set A/B to 0%
L Switch to Lower Power Mode, turns A/B back to 0%
Mxx Set mode to xx (See mode table)
U Unlink Channels A/B

Modes

Index Name Channel C Effect Channel D Effect Description
0 Pulse Pulse Frequency Pulse PWM Type? Channels turn on/off synchronously
1 Alternating Pulse Frequency Pulse PWM Type? Channels turn on/off asynchronously
2 Continuous Pulse PWM Type? N/A Channels on continuously
3 A Pattern Pulse Frequency Pulse PWM Type? Channel A plays pattern, Channel B on
4 B Pattern Pulse Frequency Pulse PWM Type? Channel B plays pattern, Channel A on
5 Asymmetric Power Ramp Ramp Speed N/A Ramps from 0 to channel power % limit, sets to 0 repeats
6 Symmetric Power Ramp Ramp Speed N/A Ramps from 0 to channel power % limit, then ramps back to 0
7 Frequency Ramp Frequency Limit N/A Ramps channel frequencies from 0 to limit, then ramps back down
8 Alternative Frequency Ramp Frequency Limit N/A Same as 7, except Channel A/B alternate
9 Saw Wave Frequency Range N/A Plays saw wave with varying frequencies
10 Sine Wave Frequency Range N/A Plays sine wave with varying frequencies
11 Random Random Range Pulse PWM Type? Random output
12 Step Step Size Pulse PWM Type? Steps between values
13 Jump Jump Size Pulse PWM Type? Jumps between values

results matching ""

    No results matching ""