I've been fighting a bit with my MiaoMiao recently
Over the last few months its been harder and harder to get it to charge, the usual routine is simply connect the cable (attached with a couple of magnets that hold two small sprung pin connectors on the 2 round gold coloured contacts on the MiaoMiao itself). Once connected the blue LED flashes (once every 5 seconds or so) until it charges and then goes green
I started connecting it for extended periods without any sign it was doing anything, before it started to flash (maybe an hour or more before the blue light).
Did hard resets, pressed the connector on, cleaned contacts, tried different charger cables etc, but nothing worked.
Last week I ordered a new one from miaomiao.cool (cheaper than miaomiao.com) - originally it took 2 weeks to arrive (over 15 months ago now), but things have improved - 5 days this time so much better.
The new one works perfectly and was simple to switch the sensors in Xdrip, so I was up and running again.
I wanted to work out why the MiaoMiao had stopped working, and did a fair bit of googling and found very little other 'do a reset' then I found this Youtube: MiaoMiao 2 not charging
Nothing to lose, so I carefully levered apart my MiaoMiao with a pen knife blade (so as to minimise damage to the plastic case) - the two parts of the case are held together with silicone sealer so its possible, just ease it slowly and try not to slip.
So the case comes apart and the internal boards are exposed - one is the brains of the gadget with the battery on (in the fat rectangular bit) that will lift out, and there are connections to the charging points under this (shown in the Youtube), as well as a separate board that does the sensor part.
On mine it wasn't that the two connectors from the brains to the charging points needed bending (as in the Youtube) but the contacts had corroded up (damp got in as some of the silicone sealant had given up).
I cleaned those up gently by scraping the corrosion off (a dull grey-green colour) to get back to the gold coloured contacts, re-assembled the board (watch out as the magnets tend to flip out from the brains board as the glue on one of my magnets had failed) and gave it a charge test with the cable.
All working fine and light flashing blue until it goes green.
Now all I need to do is test it on a new sensor in another week or so, then seal it up with a bit of silicone (I use RTV automotive sealer) and I have a spare one just in case.
