What? Well, it’s like this.
I set up a new WiFi T100 on the Brompton yesterday and a quick check showed speed readings although it seemed to be speed reading a bit high. However, today the T100 did not work. The screen lit up but nothing that should come from the sensor registered. Checked the sensor distance to magnet on the spoke and it was OK. Checked the T100 “manual” which is a sheet of paper with simple pictures – distances within spec. Also checked the internet and found on a general cycle web site that the distance, magnet to sensor, should be within 3-5mm – and it is. Checked the magnet lines up with the white line on the sensor – it does. Opened up the sensor and found a small battery and pulled it out. OK, which way does it go back in? Can’t remember! Where is the plus or minus sign on the fittings to tell me? There isn’t one.