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Fix SIM7600 error on send data of > 1400 bytes #746

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When you try to send data > Ethernet Frame default MTU (1500) the SIM7600 responds with CIPERROR 3. This method is used too by the HTTPClient interface, so you can't send POST or other HTTP queries that exceed that size.
This PR fix that trying to split the full data array into chunks.

Signed-off-by: Luis Felipe Domínguez Vega <ldominguezvega@gmail.com>
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You can see on the SIM7600 AT commands manual:
image
That the limit is 1500.

jrlanoisTA2023 added a commit to jrlanoisTA2023/TinyGSM that referenced this pull request Jan 12, 2024
jorisvervuurt added a commit to jorisvervuurt/TinyGSM_SIM7600 that referenced this pull request Feb 9, 2024
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