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about the I2C bus on the serializer board
fred miller from United States [3 posts] |
13 year
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Steven what variables are they on the I2C bus to read from
mostly TPA81 and how do i write them
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fred miller from United States [72 posts] |
13 year
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Steven have any ideas on this
and the TPA81 variables and the list of TPA81 api commands
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Anonymous |
13 year
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Fred,
RR just supports the generic i2c command to the serializer that is a simple pass through command. RoboticsConnection would know more about connecting the serializer to the TPA81 ... or perhaps even the vendors of the TPA81 could give you some insight as to what commands they send out on the i2c bus.
STeven.
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fred miller from United States [72 posts] |
13 year
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ok thanks STEVEN
will look into it,looking at building it this week
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fred miller from United States [72 posts] |
13 year
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Steven on using the I2C bus
SetVariable "my_command", "i2c r 4 1"
in a VBScript module to query the line following sensor
what does r 4 1 meen in your example
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Anonymous |
13 year
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fred miller from United States [72 posts] |
13 year
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thanks alot Steven,i didnt see that
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fred miller from United States [72 posts] |
13 year
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STEVEN next question on using TPA81 it there a module that can take the 8 reading and then average them and compare to ambient temperature and get a difference ,also before i take the reading i need to convert celsius to fahrenheit
is there a way it can be done or any ideas
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Anonymous |
13 year
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Have a look at the Filter Variables
http://www.roborealm.com/help/Filter_Variables.php
and select the variable that contains the value and the memory size (past values) to 8 and the method to mean.
Then use a VBScript module with the following code assuming your variable is called "temperature". Note the VBScript module should be AFTER the filter variable.
' get your temperature reading (already averaged)
temp = GetVariable("temperature")
' determine difference from this and past value
diff = temp - GetVariable("last_temperature")
' convert to fahrenheit
diff = ((diff / 5 ) * 9 ) + 32
' save
SetVariable "temperature_difference", diff
' update value for next iteration
SetVariable "last_temperature", temp
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fred miller from United States [72 posts] |
13 year
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thanks a whole lot Steven,like always you are greatest at finding solutions
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