moonguru

We can’t connect to the server at smartmicrocontroller.com.This is the message I get when I try to download the code

With the receive side, I got interference from a commercial indoor/outdoor wireless thermometer. I also got interference from a wireless doorbell. However, a little bit of s/w got rid of most interference for my system based on your approach making it quite usable. Systems like this would be fine in a greenhouse isolated from these interfering sources. As RadioHead doesn't seem to work with an ATtiny85, I cannot compare it with RCSwitch. RadioHead may be better at rejecting interfering signals?Incidently, I tried a system based on a DS18B20 and using you approach but just using temperature and sensor ID information (humidity not needed) and works good.

I am very impressed with this project, so well documented and explained. I notice in your Tx circuit there is a 5.1k resistor missing from the data line of the DHT11 to Vcc?I would like to substitute the DHT12 for the DHT11 so that temperatures below Zero can be measured as well as getting improved accuracy. As the DHT12 uses an I2C bus with SDA and SCL compared to the DHT11 which just uses a single serial line, would there be much change to the software to suit the ATtiny85? If this is not possible then maybe I should try a DS18B20 as I only require temperature and not humidity?

In the DS3231 all I do is remove the 200 ohm resistor in the charging circuit. This will prevent charging a non rechargeable battery and avoid any danger.

Thanks andrei, I installed Arduino 1.8.8 and ATTinycore but at first it still failed to compile but I went very carefully over my ATTiny core hardware installation and now it compiles without errors. Thanks for your help.

I still get an error when I compile with the RCSwitch library.error: 'digitalPinToInterrupt' was not declared in this scopeHow can I get around this?

I also have an error in the Tx library file as follows.C:\Users\user\Dropbox\Arduino\libraries\rc-switch-protocollessreceiver\RCSwitch.cpp:550:32: error: 'digitalPinToInterrupt' was not declared in this scope if (digitalPinToInterrupt(i) == interrupt) {

I had no success with the Adafruit library DHT-sensor-library-master so I went to Rob Tillart/Arduino library Arduino/libraries/DHTstable. As there is no zip download I had to create folder DHTstable in my Arduino library and copy and paste dht.cpp and dht.h in it. This seemed to work ok. Note that Adafruit uses DHT while Rob uses dht.I am using Arduino 1.6.8 so I will upgrade soon. I was also using 8MHz internal clock. Incidently, in other projects I have used RadioHead for 433MHz communication. Maybe it would be too large for this project?

I installed the library DHT-sensor-library-master from Github and I get the following errors for the ATtiny85 Tx.Is this the library I should use?C:\Users\user\AppData\Local\Temp\arduino_modified_sketch_408022\sketch_jul19b.ino:2:92: fatal error: dht.h: No such file or directory #include <dht.h> // https://github.com/RobTillaart/Arduino/tree/maste...

Works well.Could a DS3231 be substituted in place of the DS1307?