Replies to This Discussion

ModeratorPermalink Reply by Hai Tran on August 12, 2011 at 12:21am

Thanks Andrew, I'll give that a try.

• ▶ Reply

ModeratorPermalink Reply by Hai Tran on August 12, 2011 at 7:27pm

I put the compass test code on my APM and I was getting compass data, a I moved the magnetometer the values changed. 

• ▶ Reply

DeveloperPermalink Reply by Andrew Tridgell on August 11, 2011 at 11:01pm

btw, I added a lot of error checking to the compass initialisation code quite recently, and it is quite possible that it is this error checking that is causing you problems. So I am very interested in exactly what is causing the init failure for you.

 

• ▶ Reply

Permalink Reply by avionics on August 23, 2011 at 6:21am

I had a similar problem for about ten days and eventually i gave up and ordered a new one from udrones, but by accident i started to play with the connector and then it started working. I guess mine was the connector on the IMU board

• ▶ Reply

Permalink Reply by kasra.mirshamsi on April 15, 2012 at 2:05am

Hi, I need a help regarding to my mag sensor. I connected the Mag sensor to IMU sheild based on method 2 given on the website. I am pretty sure about the wiring and I have uploaded the arduplane code v 2.3 through adruino IDE.

 I've then gone to CLI and tried to run the compass test from setup, and it reports that the compass initilaization failed. I cannot enable the compass, seems the board does not recognize the mag device. Any idea how can i debug this. thanks

 

• ▶ Reply

Permalink Reply by kasra.mirshamsi on April 15, 2012 at 3:59pm

I am using HMC5883L sensor and it does not have that faulty 200 resistor (called 204). I also uploaded the AP_Compass_test and trying to observe the compass response through the arduino IDE serial monitor, but still I get compass failed. Any solution please.

• ▶ Reply

3D RoboticsPermalink Reply by Chris Anderson on April 15, 2012 at 4:16pm

Kasra: get a RMA from the store you bought it from and return it for a replacement. 

• ▶ Reply

Permalink Reply by kasra.mirshamsi on July 14, 2012 at 4:44am

Hi Chris: finally I have received my replaced HMC5883L mag sensor, but again I am facing the same problem.

 

I am trying to setup the Compass in CLI mode but the compass initialization fails. I cannot enable the compass. This was the second mag sensor board which I hooked up on my APM 1.4 and I am facing the same issue.

Does my GPS need to be locked in order to setup the compass??

Do I have a problem with the I2C data bus port on my APM ? though all of the other sensors (baro, GPS, IMU, Speed,...) are working perfect.

I have also checked the voltages on HMC5883L mag sensor board. This is what I read:

1.Voltage between Vcc and GND is 4.87v

2.Voltage between SDA (data bus) and GND is 4.67v.  But once I go to CLI mode this voltage drops to zero.        

3.voltage between SCL (Clock) and GND is always zero 

Based on these info can you help me how can I debug this. Thanks

 

• ▶ Reply

3D RoboticsPermalink Reply by Chris Anderson on July 14, 2012 at 8:09am

Kasra: are you soldering it on or using a cable? 

• ▶ Reply

Permalink Reply by kasra.mirshamsi on July 14, 2012 at 8:32am

I am Soldering it.  

• ▶ Reply

3D RoboticsPermalink Reply by Chris Anderson on July 14, 2012 at 9:30am

I wonder if in the soldering you've melted some traces on the IMU shield. Is it possible to unsolder it and try adding a cable to connect it via the I2C connector instead?

• ▶ Reply

Permalink Reply by kasra.mirshamsi on July 14, 2012 at 3:09pm

Thanks chris, I will give that a try and come back with feedback.

• ▶ Reply

• ‹ Previous
• 1
• 2
• 3
• Next ›
• Page