The P2M*DIO8 Reference Manual is the primary source of technical information. Besides all relevant technical data, it also provides practical advice for deployment and installation. Please make sure to download the latest version from here.
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FAQ - Frequently Asked Questions
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Topic 1: Network Coverage
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Question: For my project I need to connect to a P2M module located in a quite unpopulated area. How can I figure out, if a specific target geo position is covered by a mobile network?
Answer: As a starting point, the GSM Association (GSMA - Global System for Mobile Communications) provides network coverage maps for each country in the world, broken down by technology (GSM, LTE, etc.) and network operator: https://www.gsma.com/coverage/ On top of this, some tools can provide further information about nearby network access points (cell towers), For example, iPhones users can try this app: https://apps.apple.com/de/app/cellular-tower-signal-finder/id6470660460
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Topic 2: Module Hard- and Software
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Question: Can I add or modify the embedded software of a P2M* module somehow?
Answer: No, typically not. P2M* modules are OEM standard products which are offered as a "black box" with a fixed set of functions and an API for integration purposes. But customer-specific hard- and software modifications are available on request. Please contact:
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Question: Can I use the 4 digital inputs to monitor a digitized parameter, e.g. the ambient temperature originated from a sensor?
Answer: P2M*DIO8 digital inputs are 1-bit ports which have been designed to read binary information originated from a switch or button or similar electromechanical component indicating a certain event or situation, e.g. an open door. The P2M device will return the actual status of each input port by SMS - separately. But, as four 1-bit input ports are available, these four input bits potentially can represent a coded digital value with an overall resolution of (up to) 16 bit. So, as a workaround, a user can read a multi-bit digital value, but has to do that sequentially, i.e. using separate SMS queries for each 1-bit input port.
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