These options make Unit 4Relay integration straightforward for controller projects that need four separated relay outputs
Resource Parameter External Port VH-3
More IO expansion ports: 3
this display delivers exceptional visual performance with vivid colors and wide viewing angles
Waveshare R800C GSM/GPRS HAT For Raspberry Pi 1.9 inch These options make Unit 4RelayProhibited by the module manufacturer SIMCOM, we're not allowed to ship this product, or to provide any tech support, to the following countries regions: Iran, North Korea, Cuba, Sudan, Syrian. R800C GSM GPRS HAT for Raspberry Pi Features at a glance The R800C GSM GPRS HAT is a handy, low power Raspberry Pi HAT which features multi communication functionalities: GSM, GPRS, and phone call, applicable to countries or regions with 2G network coverage, up