21 lines
2.2 KiB
Markdown
21 lines
2.2 KiB
Markdown
## Updates - 30/12/20
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A number of updates have been applied to the SX127X part of the library, in part to cure some known issues and also to add additional functionality. A list of the changes made is below;
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1. Correct a problem with LORA\_IQ\_INVERTED mode not working when configured.
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2. Apply some of the SX1276\_77\_8\_ErrataNote\_1\_1 fixes. '2.1 Sensitivity Optimization with a 500 kHz Bandwidth'. Note that '2.3 Receiver Spurious Reception of a LoRa Signal' has not yet been implemented, although the code is present, further testing of this 'fix' is required.
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3. Apply the revised RSSI and SNR value calculations to match the latest data sheet. The RSSI value was changed to be int16_t type since it can (now) go lower than -127dBm.
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4. Remove the private variables _PacketRSSI and _PacketSNR, they are not needed since they can be recovered direct from a SX127x register.
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5. Changes to the FSKRTTY transmit routines so that they automatically cope with transmission during a micros() roll-over.
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6. Make changes to several of the example programs that use a GPS to be able to cope automatically with a millis() roll-over
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7. Added support for SX127x devices that use the RFO\_LF or RFO\_HF ports for the transmit antenna. No support yet for an SX1272 using the RFO ports.
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8. Added 'AFSKRTTY2.h' library file to be used as the standard AFSKRTTY library for upload of HAB payloads into a PC. This version uses micros() to toggle a pin for audio and has been tested on ATMega328, DUE and ESP32. The use of tone() would be preferred but some Arduino platforms don't support it.
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9. Changed the GPS library programs 'UBLOXSerialGPS.h', 'UBLOXI2CGPS.h' and 'QuectelSerialGPS.h' so that they have compatible functions and that the same library file can be used for both softwareserial and hardware serial.
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10. A function was added, doAFCPPM(); which adjusts the LoRa devices internal oscillator PPM offset.
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11. Adjusted the calibrateImage(); function to operate correctly with fast processors.
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12. Add function to read current RSSI.
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13. Add an overloaded begin(int8\_t pinNSS, uint8\_t device); function for use with ESP32CAM.
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14. Change Receive and Transmit functions to allow for millis() roll-over at 50days.
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### Stuart Robinson
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