We present a simple and cost-effective method to build an open-source datalogger that measures the conductance of nonvascular cryptogams together with the environmental temperature and humidity. We describe the hardware design of the datalogger and provide step-by-step assembly instructions, the list of required open-source logging software, the code to run the datalogger, and a calibration protocol.
Leo, M., Lareo, A., Garcia-Saura, C., Hortal, J., Medina, N. G. BtM, a Low-cost Open-source Datalogger to Estimate the Water Content of Nonvascular Cryptogams. J. Vis. Exp. (145), e58700, doi:10.3791/58700 (2019).