Joke Collection Website - Blessing messages - 5 1 MCU controls sim900a to send and receive short messages, but when deleting short messages, it gets stuck (the light doesn't work). Please ask the Great God to point out what is wrong.
5 1 MCU controls sim900a to send and receive short messages, but when deleting short messages, it gets stuck (the light doesn't work). Please ask the Great God to point out what is wrong.
You can check whether it is while (! Hand ("OK")); This sentence failed, you can put led 4 = 0；; Play while (! Hand ("OK")); In front, see if the light will come on. If there are two, it means while (! Hand ("OK")); The jump condition is not met. You must search further.
Sim900a's manual.
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