Reliability and speed improvements, Requests Compat.#2

Merged

brentru merged 24 commits intoadafruit:masterfrom

brentru:upgrades

May 4, 2020

Commits on Apr 23, 2020

switch gps to obtain fix instead of checking, timeout-style
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switch set_gprs to configure_gprs, move the cellular bringup to the top of gprs routine
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Commits on Apr 30, 2020

instead of waiting for gprs, bring everything into configure_gprs instead
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perform CIFR within socket_connect
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reset PDP context if GPRS fails to set
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reset gprs context and bearer properly
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speed up initialization, send_check_reply only checks reply (not reply AND buffer
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black
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check for correctly reply from SAPBR
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reduce errors during gprs bringup
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only reset PDP
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modifications for requests library
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oneline the uart write
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Commits on May 1, 2020

dont print
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add simpletest mirroring w5k simpletest
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rewrite hostname parsing
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fix hostname parsing, add aio posting
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get_socket parses through CIPSTATUS socket states, returns socket if state is valid
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add reliable readline
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close sockets properly, add cheerlights example
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black!
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lintn
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linting
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return the socket alocated instead
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