I noted this item on EBAY showing the ESP-03 at well under £2 each.. Not sure about those ceramic antenna – anyone any experience of how they compare to the excellent PCB version on the ESP-01 ??
Another item of note – I see there is a new LUA update out – looking forward to checking that out at the weekend and I’ll do a write up – apparently it’s based on the 0.9.5 version of the SDK. Is this out of BETA – and if it is does anyone have the link? And any updated documentation so we know what’s changed? I have to say that Espressif don’t do the best job when it comes to promoting their own updates.
That’s it for now – later this week I plan to put together a temperature sensor using only the ESP-01 and even consider sticking a lithium and a solar cell on it (I know, not the best time of the year for solar power) – more to have a permanent test rig than anything else sending out MQTT data. The /TIME/ message I set to run every 10 seconds on my PC 3 days ago using Really Small Message Broker set up as a service, and MQTT-spy – is still ticking away (I can test it in meetings using another copy of MQTT-spy. You might have noticed I did some frighteningly fast message blasting and everything help up ok. I expect soon to have MQTT traffic running back and forth – I’ve at least 3 locations that need external solar powered temperature and humidity monitoring. MQTT-spy is due shortly to get some more improvements – looking forward to it – as for RSMB – I can’t think of anything wrong with it!