Hakim, G., Hafidz, muhammad, Firdausi, A. and Ramadhan, E. (2020) “Wireless Sensor Network Nodal Development for Low Cost and Low Power PH Soil Monitoring Agriculture 4.0 Application”, Journal FORTEI-JEERI, 1(2), pp. 10-18. doi: 10.46962/forteijeeri.v1i2.16.