@Technopro ...Rich has a lot more experience using I2C then most here on the forum and hopefully he can redirect you to some of the Forum topics regarding I2C and its proto calls. I believe there are only the two commands , I2CRead which is used more as a variable then a command which I found out recently and the I2CWrite which ....seems to have issues with certain Versions and browning out the board and as yet unresolved ...Please check out this thread until the "Add link" is repaired you will have to cut n paste https://synthiam.com/Community/Questions/5207 I would also be interested in you experience with the I2CWrite command as well. There are a few examples to try! Thanks .

I have no intentions on testing as I don't have the board. I would be happy to test as long as my board isn't damaged in any way by it.

Of Course! All the other commands and functions still work its just I2CWrite which has issues with some new versions(with three boards now that I know of) . The board loses connection and the blue light goes out but will be able to reconnect again! Have a read at the thread5207....

Yep. Well I guess its a matter of getting rich to respond seeing as he knows EZ-Script like the back of his hand.

You need to find out the correct syntax of the data that is sent to the board first. However, there are no examples of the syntax on the pages you linked to.

The I2CWrite command basically sends whatever you tell it to send to the desired address. So, if the board is addressed as 0x30 you need to provide that information.

So the command is I2CWrite(Board Number, Address, Data)

for instance

I2CWrite(0,0x30,"MSP_MISC MAXTHROTTLE 2000")
I2CWrite(0,0x30,"MSP_EEPROM_WRITE")

Note: The syntax of the data may not be correct, as mentioned there are no examples.

Find examples of the data syntax, find the list of commands, send commands one by one to the board with the I2CWrite command.

So what you wrote is wrong? And I need to find another sheet that shows a list of number commands? What should I look for?

anything here that could help? http://www.multiwii.com/forum/viewtopic.php?f=8&t=1516

I don't know if it's wrong or not, I used commands from the list you posted however there are no examples of the correct syntax and I don't have the board to try with so I can't be 100% sure it's correct. As I said late last year I'm trying not to spoon feed as much and trying to get people to figure out as much as they can through guidance in the general area/direction. The above posted explanation along with the correct syntax for the data should be enough to guide you in the right direction and program something.

It's also for the Serial Protocol too, generally I2C and Serial data is the same or very similar but it's always worth finding out.

Im having a lot of difficulty with this board. Which raises the question again. Is there better and easier out there?

And one thing I thought of is, what if we need to use rc receiver outputs rather than multiwii commands?

Discovered that i2c isn't necessarily what I use.

Wires to the left go to the receiver. If this is correct it means all we need to do is figure out the pwm signal.

How do you mean figure out the PWM signal?

If this board is what I think it is, which is something that is constantly stabilising flight and has the ability for an external controller to tell it where to move (up, down, left, right, forward, reverse, etc) then what you need to do is get all of the datasheets available for it together and study the connections. The datasheet should have all of the correct wiring instructions etc. which will indicate how to connect it to the EZ-B and what controls to use.

That image doesn't really tell us much.

Are these some? http://www.multiwii.com/wiki/index.php?title=Flightmodes

No, that was just information on flight modes. You need the actual installation and operation instructions which will explain what you need to do to use the board, from that you can work out how to use the EZ-B with it.

They do have the download on the info page for the multiwii. I downloaded 2.3. Here's just a list of the file names in it.

If there's something suspicious ill post.

Serial Baudrate:9600(found looking through arduino code)

I posted on the rc forums and here's a response when I asked for serial commands:

"Why not just have the ez-b output a cppm to the MultiWii controller or 4-5 servo pulse (1000-2000us) outputs. If you are looking for modified MultiWii code to accept serial ASCII than go the the MultiWii forum and ask there. The people who write and modify the MultiWii code do hang on that forum."

Should I go to the multiwii forums and look for modified code?

www.rcgroups.com/forums/showthread.php?t=2114942&highlight=multiwii#post27657277

Here's my reasoning. Rc receivers output pwm or ppm signals. The multiwii connects to the receivers. This means that the multiwii gets the command from the receiver and converts it to be used it own way. That is why I'm trying the ppm/pwm way.

That seems the simplest method if it can be controlled via PWM and would be pretty straight forward to set up a custom Movement Panel too.

what would 1000-2000us be? 4-5 position like he said?

I would think 1000 -2000us means microseconds...the 4-5 position ..on a scale of 1-10? just guessing though

iRobot, here's a quote from what he said that I'm questioning.

"...4-5 servo pulse (1000-2000us) outputs."

iRobot I think your 1000-2000us idea was right.

Quote from another modules description: "By varying this pulse time in the range of 1000-2000us the position of the servo can be changed"

@Technopro, I'm trying not to spoon feed you for this, not to be mean or anything but so you learn, understand and have a better experience in the future. You've shown that your getting to understand more and more from when you first joined so I'm trying to push that :)

Do a little bit of reading up on the PWM of the EZ-B, PWM in general and the board you are trying to control by PWM. To be honest I haven't really looked at the board you are trying to use, I looked at the serial commands but that's about it (to be honest I haven't had time to read up on it or even what it does). So I have no idea what varying the PWM would do.

If you understand PWM and you understand the controller you are trying to control via PWM it should all click in to place and you'll get that Eureka moment we all get from time to time.

If you are still struggling with it after reading up on it all I'll have a proper look at the board you are talking about but try to work it out for yourself, you can do it :)

Rich, here's what I know now: The board connects to 8 digital pins on the ez-b. Each wire runs a channel. Sending pulses of varying times acts as a command or level of the multiwii. The average rc receiver sends commands between 1000-2000us (which I think is actually 1-2ms) in length.