Are you intending to record the time they reach the monitoring station in the PICAXE or in the iButton ?I am using the iButton to detect the person and need it to store the time in which they are detected.
How large is this course? The "wirelessly" may be your biggest challenge.... will then be wirelessly transmitted to another Picaxe (Still figuring that out). I'm thinking of using the XRF module for this.
Do not read time from the iButton but from the local DS1307 : I2C-Real-Time-Clock-DS1307/So how do I read the time from the iButton and display it on a screen. People have said to use the owout/owin command but I have no idea how to do that and there's little help online.
Example readowsn/All in all it will be much simpler and more reliable to have the RTC (e.g. DS1307) on the PICAXE board and just record the DS1990A serial number when touched on the PICAXE using readowsn.
If the wireless part is failproof, you will need only one clock on the main hub.The main priority for the system and reason for the wireless part is for safety. The checkpoints will communicate with the main hub in order to show supervisors where people were last checked in.
+1How large is this course? The "wirelessly" may be your biggest challenge.