Production Guidance; Reflow Temperature; Reflow Graph; Faq - Ebyte LoRa SX-1276 1W User Manual

SX127X RF Module
Make sure the grounding is good, with low power ripple, also should increase filter capacitor and as close as possible to the VCC and
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GND pins.
SPI communication rate should not be set too high, usually around 1M
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Make sure TXEN pin is high level, RXEN pin is low level when transmitting;
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make sure RXEN pin is high level, TXEN pin is low level when receiving;
make sure TXEN、RXEN pin is low level before turning off.
The register configuration can be reinitialized to obtain higher stability when the chip is invalid.
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5. Production Guidance

5.1 Reflow Temperature

Preheating zone：Maximum temperature rise is 2.5℃/s；
Insulation zone：temperature: 150~190℃，time: 60~90s，Maximum temperature rise is 2.5℃/s；
Recirculation zone：Maximum temperature is 235~245℃，Above 217℃, the time will be 40~80s；
Cooling zone：Maximum cooling is 4℃/s.

5.2 Reflow Graph

6. FAQ

6.1 The communication distance is too close

When there's straight
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Temperature, humidity and same frequency interference will increase the rate of communication packet loss.
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Ground absorption, reflected radio waves, and closing to ground will lead to poor test result.
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Sea water has a strong ability to absorb radio waves, so test near the sea is not recommended .
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If antennas surrounded by metal items or placed in metal shell, the signal will be weakened badly.
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Power register is set wrongly or air data rate too high.(The higher the air data rate, the closer the distance.
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In room temperature, the power voltage will be less than 2.5V. The lower the the power voltage, the smaller the power.
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The antenna is unmatched to the module or the quality of antenna.
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Communication barrier, the communication distance will be reduced accordingly.
User Manual of E19 Series Modules
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