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sandeepmistry / arduino-LoRa

An Arduino library for sending and receiving data using LoRa radios.
MIT License
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Bad LoRa Range with electron Particle. #52

Closed pearteardial closed 6 years ago

pearteardial commented 7 years ago

Hi Everyone,

I am using an electron with a SX1276 lora module to act as a receiver and I'm having a strange issue.

When I connect up the LoRa module to a Arduino mini, I get good range (100m in built up city).

When I connect up the electron to the same LoRa module the range drops to about 25m. any idea why this might be?

Here are the reg dumps from both setups:

ok here's the arduino LoRa Dump Registers 0x0: 0x44 0x1: 0x81 0x2: 0x1A 0x3: 0xB 0x4: 0x0 0x5: 0x52 0x6: 0xE4 0x7: 0xC0 0x8: 0x0 0x9: 0x8F 0xA: 0x9 0xB: 0x2B 0xC: 0x23 0xD: 0x2 0xE: 0x0 0xF: 0x0 0x10: 0x0 0x11: 0x0 0x12: 0x0 0x13: 0x0 0x14: 0x0 0x15: 0x0 0x16: 0x0 0x17: 0x0 0x18: 0x10 0x19: 0x0 0x1A: 0x0 0x1B: 0x0 0x1C: 0x0 0x1D: 0x72 0x1E: 0x70 0x1F: 0x64 0x20: 0x0 0x21: 0x8 0x22: 0x1 0x23: 0xFF 0x24: 0x0 0x25: 0x0 0x26: 0x4 0x27: 0x0 0x28: 0x0 0x29: 0x0 0x2A: 0x0 0x2B: 0x0 0x2C: 0x0 0x2D: 0x50 0x2E: 0x14 0x2F: 0x45 0x30: 0x55 0x31: 0xC3 0x32: 0x5 0x33: 0x27 0x34: 0x1C 0x35: 0xA 0x36: 0x3 0x37: 0xA 0x38: 0x42 0x39: 0x12 0x3A: 0x49 0x3B: 0x1D 0x3C: 0x0 0x3D: 0xAF 0x3E: 0x0 0x3F: 0x0 0x40: 0x0 0x41: 0x0 0x42: 0x12 0x43: 0x24 0x44: 0x2D 0x45: 0x0 0x46: 0x3 0x47: 0x0 0x48: 0x4 0x49: 0x23 0x4A: 0x0 0x4B: 0x9 0x4C: 0x5 0x4D: 0x84 0x4E: 0x32 0x4F: 0x2B 0x50: 0x14 0x51: 0x0 0x52: 0x0 0x53: 0x11 0x54: 0x0 0x55: 0x0 0x56: 0x0 0x57: 0xF 0x58: 0xE0 0x59: 0x0 0x5A: 0xC 0x5B: 0x0 0x5C: 0x7 0x5D: 0x0 0x5E: 0x5C 0x5F: 0x78 0x60: 0x0 0x61: 0x1C 0x62: 0xE 0x63: 0x5B 0x64: 0xCC 0x65: 0x0 0x66: 0x1 0x67: 0x50 0x68: 0x0 0x69: 0x0 0x6A: 0x0 0x6B: 0x0 0x6C: 0x0 0x6D: 0x0 0x6E: 0x0 0x6F: 0xB 0x70: 0xD0 0x71: 0x0 0x72: 0x14 0x73: 0x0 0x74: 0x0 0x75: 0x0 0x76: 0x0 0x77: 0x0 0x78: 0x0 0x79: 0x0 0x7A: 0x0 0x7B: 0x0 0x7C: 0x0 0x7D: 0x0 0x7E: 0x0 0x7F: 0x0

Particle & LoRa LoRa Dump Registers 0x0: 0x49 0x1: 0x81 0x2: 0x1A 0x3: 0xB 0x4: 0x0 0x5: 0x52 0x6: 0xE4 0x7: 0xC0 0x8: 0x0 0x9: 0x8F 0xA: 0x9 0xB: 0x2B 0xC: 0x23 0xD: 0x1 0xE: 0x0 0xF: 0x0 0x10: 0x0 0x11: 0x0 0x12: 0x0 0x13: 0x0 0x14: 0x0 0x15: 0x0 0x16: 0x0 0x17: 0x0 0x18: 0x10 0x19: 0x0 0x1A: 0x0 0x1B: 0x0 0x1C: 0x0 0x1D: 0x72 0x1E: 0x70 0x1F: 0x64 0x20: 0x0 0x21: 0x8 0x22: 0x1 0x23: 0xFF 0x24: 0x0 0x25: 0x0 0x26: 0x4 0x27: 0x0 0x28: 0x0 0x29: 0x0 0x2A: 0x0 0x2B: 0x0 0x2C: 0x0 0x2D: 0x50 0x2E: 0x14 0x2F: 0x45 0x30: 0x55 0x31: 0xC3 0x32: 0x5 0x33: 0x27 0x34: 0x1C 0x35: 0xA 0x36: 0x3 0x37: 0xA 0x38: 0x42 0x39: 0x12 0x3A: 0x49 0x3B: 0x1D 0x3C: 0x0 0x3D: 0xAF 0x3E: 0x0 0x3F: 0x0 0x40: 0x0 0x41: 0x0 0x42: 0x12 0x43: 0x24 0x44: 0x2D 0x45: 0x0 0x46: 0x3 0x47: 0x0 0x48: 0x4 0x49: 0x23 0x4A: 0x0 0x4B: 0x9 0x4C: 0x5 0x4D: 0x84 0x4E: 0x32 0x4F: 0x2B 0x50: 0x14 0x51: 0x0 0x52: 0x0 0x53: 0x11 0x54: 0x0 0x55: 0x0 0x56: 0x0 0x57: 0xF 0x58: 0xE0 0x59: 0x0 0x5A: 0xC 0x5B: 0x0 0x5C: 0x7 0x5D: 0x0 0x5E: 0x5C 0x5F: 0x78 0x60: 0x0 0x61: 0x1C 0x62: 0xE 0x63: 0x5B 0x64: 0xCC 0x65: 0x0 0x66: 0x1 0x67: 0x50 0x68: 0x0 0x69: 0x0 0x6A: 0x0 0x6B: 0x0 0x6C: 0x0 0x6D: 0x0 0x6E: 0x0 0x6F: 0xB 0x70: 0xD0 0x71: 0x0 0x72: 0x13 0x73: 0x0 0x74: 0x0 0x75: 0x0 0x76: 0x0 0x77: 0x0 0x78: 0x0 0x79: 0x0 0x7A: 0x0 0x7B: 0x0 0x7C: 0x0 0x7D: 0x0 0x7E: 0x0 0x7F: 0x0

dc2mw commented 6 years ago

My advice is to go for some sort of RF measurement equipment. For 20 US$ you can setup a software defined radio (RTL-SDR dongle + piece of wire as antenna + software of choise, e. g. GNU Radio, SDR#, GQRX etc. ) and "measure" or at least check RF output signals of modules.

Then you can see if the library configures your specific modules correctly, e. g. Reg 0x01 Bit3, Reg 0x09 Bit7 and Reg 0x4d (0x84 vs. 0x87) must be correctly set for the brand/version of the module. Not simply equally set for any SX1276 chip! The difference between correct/incorrect settings is huge and can be observed with low-cost RF measurement equipment.

LoRa is problematic in this respect, even in case of severe mistakes/faulty modules one might still get hundred meters of range :-)

sandeepmistry commented 6 years ago

@pearteardial are there any differences in the register values between the two?

Maybe the Particle board can't supply enough current, can you try with an external 3.3V source?

sandeepmistry commented 6 years ago

Closing this for now due to lack of feedback, please re-open with requested info. if you are still interested.