The question as below reach me. I will quote myself.<\/p>\n
Q:<\/strong> Please let me know the tips , to ensure connectivity all the time. I am loosing connectivity after 2\/3 days , I need to manually reconnect by ringing the modem again as on now.<\/p>\n A:<\/strong> There are several sources for disconnect.<\/p>\n The client (what means your IoT M2M device) has to take care on a connection to the cellular network. \u201cSome power supply concepts including LT Spice modules for DC\/DC regulators and load generator for the 2 Ampere peak currents are a part of the book too. Be aware, that the power down reset is still the main fault in designs with cellular modules.\u201d Read more at my IoT M2M Cookbook<\/a>.<\/p>\n 12.1 TX power peaks by cellular module test mode My recommendation is to read the IoT M2M Cookbook and compare the recommendations with your design.<\/p>\n \nChapter: AT commands and logic loops for set up a communication channel<\/h3>\n
\nRead more at my IoT M2M Cookbook<\/a>.<\/p>\nChapter: Supply voltage<\/h3>\n
\nRead more at my IoT M2M Cookbook<\/a>.<\/p>\nChapter: Examples for mistakes and errors during M2M development – Power down reset<\/h3>\n
Chapter: Testing your M2M device<\/h3>\n
\n12.2 Pseudo load of 2 Ampere peak load with self-made function generator
\n12.2.1 Schematic diagram of the self-made function generator
\n12.2.2 Pseudo load with 2 Ampere peak by standard function generator
\n12.3 TX power peaks by GSM tester
\n12.4 Testing of the sensitivity
\n12.5 Testing of the radiated TX power
\n12.6 Where to get a cheap cellular tester?
\nRead more at my IoT M2M Cookbook<\/a>.<\/p>\n