No I2C devices found!! #5
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If you want to use the edge 3V3 and GND you will have to close the solder jumpers marked 3V3 and GND on the back of the board. |
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Hi Kris, Thanks for the early response. I have soldered the jumpers as shown in the image below. I have also soldered jumper for AD0 but I am not giving any voltage to this pin. Now it is finding I2C devices on all addresses.
Here are the logs: I2C device found at address 0x01 ! BNO055 9-axis motion sensor... |
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Connect SDA/SCL and 3V3 and GND to the corresponding pins on the Teensy. If -----Original Message----- Hi Kris, Thanks for the early response. I have soldered the jumpers as shown in the imag1088 1 Here are the logs: I2C device found at address 0x01 ! BNO055 9-axis motion sensor... Reply to this email directly or view it on GitHub |
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Hi Kris, Here are the voltages: B/w GND and 3v3 : 3.3V I have connected SDA to pin 17 of teensy and SCL to pin 16 of teensy. |
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Good, and in your sketch are you using pins 16 and 217 in the Wire.begin If you run a scan are you still seeing all of the addresses? This could be -----Original Message----- Hi Kris, Here are the voltages: B/w GND and 3v3 : 3.3V I have connected SDA to pin 17 of teensy and SCL to pin 16 of teensy. Reply to this email directly or view it on GitHub |
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Yes I am using pin 16 and pin 17 and it is showing I2C device found in all the addresses. Regarding short I sent you an image above in which I shorted ground, 3v3 and AD0 jumpers. Here I see one ambiguity, I just unshorted the GND jumper and what I see is this: GND pin and first rectangle of ground jumper are connected with each other but same is not the case with AD0 pin and first rectangle of AD0 jumper. So what I want to ask is , should ground pin of sensor and adjacent rectangle of ground jumper should be short internally or not?
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The expected use of this device is to mount directly onto the Teensy with 3V3 and GND taken from the edge pins near the Teensy reset button and connected to the two port on the top of the board. This is the default. You may also take 3V3 and GND from the edge pins for breadboard use. In this case, the solder jumpers on the back marked 3V3 and GND need to be closed to connect the edge pins to the 3V3 and GND circuits, respectively. It looks like you have not done this for GND. Closing the solder jumper means using solder to connect the two rectangular pads together. One of the rectangular pads is connected to either the GND circuit or 3V3 circuit and the other is connected to the edge pin. If the solder also makes a connection between the rectangular pad and the edge pin in these cases it shouldn't matter, but this is not good practice in general. You have also closed the solder jumper marked ADO. ADO is pulled up by default to set the I2C address at 0x29. If you close the ADO solder jumper this sets the address of the BNO055 to 0x28. |
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Hi Kris, Now I have removed solder from every jumper and I am giving it power from those two pins which you mentioned above. Please see the images below for reference but still I am not able to find any of the I2C devices. I have tried running program with both AD0=0 and AD0=1 but still the same result. I have also checked the shorts with multimeter but none of the jumpers are shorted.
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I don't know what you could be doing wrong. Please send the device back to Kris -----Original Message----- Hi Kris, Now I have removed solder from every jumper and I am giving it power from I have also checked the shorts with multimeter but none of the jumpers are imag1094 1 imag1095 1 Reply to this email directly or view it on GitHub |
I have teensy 3.2 and BNO055+BMP280. I am trying to connect it with teensy and I have uploaded your code and edited this line
define AD0 0, so the device address should be 0x28
My connections are as follows:
3.3 V pin of teensy is connected to 3v3 pin of BNO which is adjacent to SCL pin.
Gnd is connected to Gnd Pin of BNO which is adjacent to pin PS0.
SDA and SCL are connected accordingly as shown in the images below.
Here are the logs ......
Scanning...
Unknow error at address 0x01
Unknow error at address 0x02
Unknow error at address 0x03
Unknow error at address 0x04
Unknow error at address 0x05
Unknow error at address 0x06
Unknow error at address 0x07
Unknow error at address 0x08
Unknow error at address 0x09
Unknow error at address 0x0A
Unknow error at address 0x0B
Unknow error at address 0x0C
Unknow error at address 0x0D
Unknow error at address 0x0E
Unknow error at address 0x0F
Unknow error at address 0x10
Unknow error at address 0x11
Unknow error at address 0x12
Unknow error at address 0x13
Unknow error at address 0x14
Unknow error at address 0x15
Unknow error at address 0x16
Unknow error at address 0x17
Unknow error at address 0x18
Unknow error at address 0x19
Unknow error at address 0x1A
Unknow error at address 0x1B
Unknow error at address 0x1C
Unknow error at address 0x1D
Unknow error at address 0x1E
Unknow error at address 0x1F
Unknow error at address 0x20
Unknow error at address 0x21
Unknow error at address 0x22
Unknow error at address 0x23
Unknow error at address 0x24
Unknow error at address 0x25
Unknow error at address 0x26
Unknow error at address 0x27
Unknow error at address 0x28
Unknow error at address 0x29
Unknow error at address 0x2A
Unknow error at address 0x2B
Unknow error at address 0x2C
Unknow error at address 0x2D
Unknow error at address 0x2E
Unknow error at address 0x2F
Unknow error at address 0x30
Unknow error at address 0x31
Unknow error at address 0x32
Unknow error at address 0x33
Unknow error at address 0x34
Unknow error at address 0x35
Unknow error at address 0x36
Unknow error at address 0x37
Unknow error at address 0x38
Unknow error at address 0x39
Unknow error at address 0x3A
Unknow error at address 0x3B
Unknow error at address 0x3C
Unknow error at address 0x3D
Unknow error at address 0x3E
Unknow error at address 0x3F
Unknow error at address 0x40
Unknow error at address 0x41
Unknow error at address 0x42
Unknow error at address 0x43
Unknow error at address 0x44
Unknow error at address 0x45
Unknow error at address 0x46
Unknow error at address 0x47
Unknow error at address 0x48
Unknow error at address 0x49
Unknow error at address 0x4A
Unknow error at address 0x4B
Unknow error at address 0x4C
Unknow error at address 0x4D
Unknow error at address 0x4E
Unknow error at address 0x4F
Unknow error at address 0x50
Unknow error at address 0x51
Unknow error at address 0x52
Unknow error at address 0x53
Unknow error at address 0x54
Unknow error at address 0x55
Unknow error at address 0x56
Unknow error at address 0x57
Unknow error at address 0x58
Unknow error at address 0x59
Unknow error at address 0x5A
Unknow error at address 0x5B
Unknow error at address 0x5C
Unknow error at address 0x5D
Unknow error at address 0x5E
Unknow error at address 0x5F
Unknow error at address 0x60
Unknow error at address 0x61
Unknow error at address 0x62
Unknow error at address 0x63
Unknow error at address 0x64
Unknow error at address 0x65
Unknow error at address 0x66
Unknow error at address 0x67
Unknow error at address 0x68
Unknow error at address 0x69
Unknow error at address 0x6A
Unknow error at address 0x6B
Unknow error at address 0x6C
Unknow error at address 0x6D
Unknow error at address 0x6E
Unknow error at address 0x6F
Unknow error at address 0x70
Unknow error at address 0x71
Unknow error at address 0x72
Unknow error at address 0x73
Unknow error at address 0x74
Unknow error at address 0x75
Unknow error at address 0x76
Unknow error at address 0x77
Unknow error at address 0x78
Unknow error at address 0x79
Unknow error at address 0x7A
Unknow error at address 0x7B
Unknow error at address 0x7C
Unknow error at address 0x7D
Unknow error at address 0x7E
No I2C devices found
BNO055 9-axis motion sensor...
BNO055 Address = 0x28
BNO055 WHO_AM_I = 0x0
BNO055 I AM FF I should be 0xA0
BNO055 ACC I AM FF I should be 0xFB
BNO055 MAG I AM FF I should be 0x32
BNO055 GYRO I AM FF I should be 0x0F
Could not connect to BNO055: 0xFF
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