2017-02-13 08:20:33 +00:00
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# Cyrustek ES51922 serial protocol
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The information in this document are taken from the [Cyrustek ES51922 datasheet](http://www.cyrustek.com.tw/spec/ES51922.pdf).
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## Serial signaling
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19230 baud, 7 bits frames, odd parity, 1 stop bit.
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## Packet format
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14 frames, including the line ending markers CR and LF.
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2017-02-13 08:25:05 +00:00
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| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
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|-------|--------|--------|--------|--------|--------|----------|--------|---------|---------|---------|---------|----|----|
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| Range | Digit4 | Digit3 | Digit2 | Digit1 | Digit0 | Function | Status | Option1 | Option2 | Option3 | Option4 | CR | LF |
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2017-02-13 08:20:33 +00:00
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## Fields
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### Range
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| Code | V | 2-range auto A | 22A | Manual A | ADP | Ω | Frequency | Capacitor |
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|:---------:|---------:|:-------------------|-------:|---------:|:-----:|--------:|----------:|----------:|
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| 011 0000 | 2.2000V | Lower range (IVSL) | 22.000A| 2.2000A | ADP4 | 220.00Ω| 22.00Hz | 22.000nF |
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| 011 0001 | 22.000V | Higher range (IVSH)| | 22.000A | ADP3 | 2.2000KΩ| 220.0Hz | 220.00nF |
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| 011 0010 | 220.00V | | | 220.00A | ADP2 | 22.000KΩ| | 2.2000µF |
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| 011 0011 | 2200.0V | | | 2200.0A | ADP1 | 220.00KΩ| 22.000KHz | 22.000µF |
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| 011 0100 | 220.00mV | | | 22000A | ADP0 | 2.2000MΩ| 220.00KHz | 220.00µF |
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| 011 0101 | | | | | | 22.000MΩ| 2.2000MHz | 2.2000mF |
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| 011 0110 | | | | | | 220.00MΩ| 22.000MHz | 22.000mF |
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| 011 0111 | | | | | | | 220.00MHz | 220.00mF |
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### Digits
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| Code | Digit |
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|:--------:|:-----:|
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| 011 0000 | 0 |
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| 011 0001 | 1 |
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| 011 0010 | 2 |
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| 011 0011 | 3 |
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| 011 0100 | 4 |
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| 011 0101 | 5 |
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| 011 0110 | 6 |
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| 011 0111 | 7 |
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| 011 1000 | 8 |
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| 011 1001 | 9 |
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### Function
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| Code | Mode | VBAR=0 | VBAR=1 |
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|:--------:|:--------------|:--------------:|:-------------------:|
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| 011 0000 | 22A Current | Don't care | Don't care |
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| 011 0001 | Diode | Don't care | Don't care |
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| 011 0010 | Frequency | Don't care | Don't care |
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| 011 0011 | Ω | Don't care | Don't care |
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| 011 0100 | Temperature | Don't care | Don't care |
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| 011 0101 | Continuity | Don't care | Don't care |
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| 011 0110 | Capacitance | Don't care | Don't care |
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| 011 0111 | ? | ? | ? |
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| 011 1000 | ? | ? | ? |
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| 011 1001 |Manual Current | Don't care | Don't care |
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| 011 1010 | ? | ? | ? |
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| 011 1011 | Voltage | Don't care | Don't care |
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| 011 1100 | ? | ? | ? |
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| 011 1101 |Auto µA Current|Auto µA Current |Auto 220.00A/2200.0A |
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| 011 1110 | ADP | Don't care | Don't care |
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| 011 1111 |Auto mA Current|Auto mA Current |Auto 22.000A/220.00A |
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### Status
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| Bit 6 | Bit 5 | Bit 4 | Bit 3 | Bit 2 | Bit 1 | Bit 0 |
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|:-----:|:-----:|:-----:|:-----:|:-----:|:-----:|:-----:|
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| 0 | 1 | 1 | Judge | Sign | BATT | OL |
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### Options
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#### Option 1
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| Bit 6 | Bit 5 | Bit 4 | Bit 3 | Bit 2 | Bit 1 | Bit 0 |
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|:-----:|:-----:|:-----:|:-----:|:-----:|:-----:|:-----:|
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| 0 | 1 | 1 | MAX | MIN | REL | RMR |
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#### Option 2
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| Bit 6 | Bit 5 | Bit 4 | Bit 3 | Bit 2 | Bit 1 | Bit 0 |
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|:-----:|:-----:|:-----:|:-----:|:-----:|:-----:|:-----:|
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| 0 | 1 | 1 | UL | Pmax | Pmin | 0 |
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#### Option 3
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| Bit 6 | Bit 5 | Bit 4 | Bit 3 | Bit 2 | Bit 1 | Bit 0 |
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|:-----:|:-----:|:-----:|:-----:|:-----:|:-----:|:-----:|
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| 0 | 1 | 1 | DC | AC | AUTO | VAHZ |
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#### Option 4
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| Bit 6 | Bit 5 | Bit 4 | Bit 3 | Bit 2 | Bit 1 | Bit 0 |
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|:-----:|:-----:|:-----:|:-----:|:-----:|:-----:|:-----:|
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| 0 | 1 | 1 | 0 | VBAR | Hold | LPF |
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