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Hi everyone, I'm currently designing a telemetry circuit using several GSM/LTE modules (SIM800L and some newer Quectel modules) for a remote environmental monitoring station. One challenge I’m facing isn't just the hardware layout, but the identity management of these nodes. When managing a fleet of 20+ remote devices, identifying each unit through its phone number becomes a nightmare if the numbers are randomized or disorganized. I’ve found that using a structured numbering system — or what we in Southeast Asia call Sim số đẹp (meaning "beautiful" or structured numbers) — significantly reduces human error during the testing and maintenance phase. My questions for the experts here are: Do you typically hardcode the device's phone number into the firmware, or do you prefer a dynamic lookup table via an API? How do you handle the signal interference between multiple high-gain antennas in a compact enclosure? I've noticed some jitter in my ADC readings whenever the GSM module bursts. I’ve attached my current power decoupling circuit for the GSM modules below. Any feedback on the capacitor values would be greatly appreciated! Best regards, Khosim |
1 hour, 18 minutes ago |
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