Thanks AllyCat, some very useful comments.
I looked at a few I2C sensors, but I’m only just figuring out PICAXE programming, let alone I2C! And I wondered if, with 16 sensors, addressing might be a bit fruity. That’s as far as I went with it. Maybe a challenge for the future. The 8-bit humidity...
Spec on DHT11 is +-5%, so two examples can quite possibly be 10% apart. Even the HTU21D 'Digital High Accuracy RH/T Sensor' is only spec'd to +-3%. For my 16 sensors, I had intended to select them against one that I determine as a 'gold standard'. I did think about having provision for a...
The application I had in mind will use 16 temp/humidity sensors, would you believe, via a multiplexing arrangement. So price is a small issue. I bought four to experiment with. One was a bit wayward, but the other three were consistent with other instruments and each other. At their price...
I did look at the higher end PICAXE chips, which look like they would make the coding easier with their extended command set and array capability, but I really wanted to do it with the cheapest, lowest performance PICAXE.
I suppose I could just paste it in....!
symbol dht = c.4 ;dht11 sensor.
symbol oled=c.0 ;OLED display.
Long story short, I had reason to look at a simple and cheap way to create a multi-sensor temperature and humidity control system. I came across the DHT11 sensor, which looked ideal. But subsequently it became apparent that it wasn’t a good match for the Picaxe, which is the only microcontroller...