ANT Forum

Below is the raw communication to an ANT stick. I'm trying to set up background scanning.
My goal is to use channel 0 of this stick to listen for ANT sensors when they start communicating.
The number in the left column is milliseconds.

7 tx: a4 01 4a 00 ef ANT_SYSTEM_RESET
359 rx: a4 01 6f 20 ea (OK)

1110 tx: a4 09 46 00 -- -- -- -- -- -- -- -- -- ANT_SET_NETWORK
1409 rx: a4 03 40 00 46 00 a1 (OK)

2010 tx: a4 02 4d 00 54 bf ANT_REQ_MESSAGE, (capabilities)
2459 rx: a4 06 54 08 03 00 ba 36 00 71
Standard Options:
Advanced Options:
CAPABILITIES_NETWORK_ENABLED
CAPABILITIES_SERIAL_NUMBER_ENABLED
CAPABILITIES_PER_CHANNEL_TX_POWER_ENABLED
CAPABILITIES_LOW_PRIORITY_SEARCH_ENABLED
CAPABILITIES_SEARCH_LIST_ENABLED
Advanced 2 Options:
CAPABILITIES_EXT_MESSAGE_ENABLED
CAPABILITIES_SCAN_MODE_ENABLED
CAPABILITIES_PROX_SEARCH_ENABLED
CAPABILITIES_EXT_ASSIGN_ENABLED

2560 tx: a4 04 42 00 40 00 01 a3 ANT_ASSIGN_CHANNEL
2809 rx: a4 03 40 00 42 00 a5 (OK)

2914 tx: a4 02 66 00 01 c1 ANT_ENABLE_EXT_MSGS
3159 rx: a4 03 40 00 66 00 81 (OK)

3264 tx: a4 02 63 00 ff 3a ANT_LP_SEARCH_TIMEOUT
3859 rx: a4 03 40 00 63 00 84 (OK)

3962 tx: a4 01 4b 00 ee ANT_OPEN_CHANNEL
4559 rx: a4 03 40 00 4b 00 ac (OK)

Is this sequence correct? I've tried to activate a sensor after this setup but I'm not getting any data.

thanks


     

Hi,

If you are trying to listen for any ANT+ sensors, you also need to wildcard the Device ID (0, 0, 0), and set the RF Channel to 57.

Cheers

P.S. I edited out the ANT+ network key from your post as it's not technically allowed for public posting      

Sorry about the key.

after assign channel:
2554 tx: a4 04 42 00 40 00 01 a3 ANT_ASSIGN_CHANNEL
2803 rx: a4 03 40 00 42 00 a5 (OK)

I sent
2908 tx: a4 05 51 00 00 00 00 00 f0 ANT_CHANNEL_ID
3153 rx: a4 03 40 00 51 00 b6 (OK)
channel number = 0x00
device number = 0x0000
device type = 0x00
trans. type = 0x00

What is the command to set the channel to 57 (0x39?)? I thought that I was trying to use channel 0
for this? Do you mean device type?


     

On page 68 of the ANT Message Protocol and Usage document, the "Channel RF Frequency" command (0x45) lets you set the channel frequency. ANT channels are 1 MHz wide with respect to the 2.4GHz ISM RF band.