Page Comparison

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• This was the output with no mppt and 0V on the vsense pin, so the next steps are to see how accurate it is with different nomura input output voltages. In any case, seeing i2c reads is such a relief.

• hmm it was on the MCP3427_CHANNEL_2, but I swtiched to 1 and was able to see this output:

  
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21480
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21480
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21480
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21480
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21480
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21480
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21481
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21480
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21481

  the actual voltage is 25.2V

  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21498
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21498
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21497
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21498
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21500
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21498
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21497

  thats for 25.6V, so there is a change

  awesome its not calibrated correctly, but there definitely is change! (this is 26V)

  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21822
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21824
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21822
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21826
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21825
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 21823

  and when the output voltage from the mppt is 0, it takes about 30 seconds to stabilize (ramp down) but then i see this
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 10
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 10
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 10
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 10
  [0] projects/smoke_mcp3427/src/main.c:150: Voltage sense mcp3427 ID = 5; Value = 10

• one question that remains is: why does this work on MCP3427_CHANNEL_1 when im initializing port 2?

• answer ^ there are two channels on the MCP3427 adc, and in all cases we only use channel 1 :p

New day, more data (sept 19th)

• I am testing the mcp3427 with the hall effect sensor rn

• i can read data from the i2c to mcp3427, and the following table summarizes the current through the hall effect, the voltage on the vsense pin on the adc and the minicom readings