For the MQ-2, you can follow this project, you also need to use some jumber to connect with the module and Seeeduino Lotus. https://create.arduino.cc/projecthub/Aritro/smoke-detection-using-mq-2-gas-sensor-79c54a
For the MQ-2, you can follow this project, you also need to use some jumber to connect with the module and Seeeduino Lotus. https://create.arduino.cc/projecthub/Aritro/smoke-detection-using-mq-2-gas-sensor-79c54a