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Libraries
Modules
M590
http://www.14core.com/wiring-the-neoway-industrial-type-m590-m590e-gsmgprs-sms-notification/
http://arduinotehniq.blogspot.de/2015/09/gprs-module-with-m590-for-sms-projects-1.html
https://www.rfsolutions.co.uk/downloads/1456226518Neoway-M590.pdf