txPower and DataRate settings

[everhamme]

I'd like to modify setDataRate and setTxPower. Could you document valid range of values in // Configure LoRaWAN connection? I tried hunting down the forks and its not clear.. Here's what I found

Valid DataRate

• LoRaWAN US or AU:
• 0: SF = 10, BW = 125 kHz, BitRate = 980 bps
• 1: SF = 9, BW = 125 kHz, BitRate = 1760 bps
• 2: SF = 8, BW = 125 kHz, BitRate = 3125 bps
• 3: SF = 7, BW = 125 kHz, BitRate = 5470 bps

Valid TxPower

I believe its expressed in dB
0 to 20 (eu) ... maybe 0 to 14 (us)

Let me know!

[kriswiner]

The way I understand it is that in the LoRaWAN protocol, these are set by the gateway in downlink messages to the end node. But from the board variant source files: int LoRaWANClass::setTxPower(float power) { unsigned int txPower; MibRequestConfirm_t mibReq; if (!_Band) { return 0; } if (_tx_busy) { return 0; } if (_Band->Region == LORAWAN_REGION_US915) { txPower = (floorf(30.0f - power) + 1) / 2; } else { txPower = (floorf(LoRaMacParams.MaxEirp - power) + 1) / 2; } etc. int setTxPower(float power); // 2dm to 20dbm data rate looks right. Is there some documenttion of this Thomas?

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On Thu, Jan 17, 2019 at 7:19 AM Ed Verhamme ***@***.***> wrote: I'd like to modify seteDataRate and setTxPower. Could you document valid range of values in // Configure LoRaWAN connection? I tried hunting down the forks and its not clear.. Here's what I found Valid DataRate - LoRaWAN US or AU: - - 0: SF = 10, BW = 125 kHz, BitRate = 980 bps - 1: SF = 9, BW = 125 kHz, BitRate = 1760 bps - 2: SF = 8, BW = 125 kHz, BitRate = 3125 bps - 3: SF = 7, BW = 125 kHz, BitRate = 5470 bps Valid TxPower I believe its expressed in dB 0 to 20 (eu) ... maybe 0 to 14 (us) Let me know! — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#12>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AGY1qi_fZCb8MGdZGCh_XLVdhLT3PAv7ks5vEJSegaJpZM4aFz_3> .

[kriswiner]

A bit of googling and I found this: https://blog.dbrgn.ch/2017/6/23/lorawan-data-rates/ On Thu, Jan 17, 2019 at 10:40 AM Tlera Corporation <[email protected]> wrote:

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The way I understand it is that in the LoRaWAN protocol, these are set by the gateway in downlink messages to the end node. But from the board variant source files: int LoRaWANClass::setTxPower(float power) { unsigned int txPower; MibRequestConfirm_t mibReq; if (!_Band) { return 0; } if (_tx_busy) { return 0; } if (_Band->Region == LORAWAN_REGION_US915) { txPower = (floorf(30.0f - power) + 1) / 2; } else { txPower = (floorf(LoRaMacParams.MaxEirp - power) + 1) / 2; } etc. int setTxPower(float power); // 2dm to 20dbm data rate looks right. Is there some documenttion of this Thomas? On Thu, Jan 17, 2019 at 7:19 AM Ed Verhamme ***@***.***> wrote: > I'd like to modify seteDataRate and setTxPower. Could you document valid > range of values in // Configure LoRaWAN connection? I tried hunting down > the forks and its not clear.. Here's what I found > > Valid DataRate > > - LoRaWAN US or AU: > - > - 0: SF = 10, BW = 125 kHz, BitRate = 980 bps > - 1: SF = 9, BW = 125 kHz, BitRate = 1760 bps > - 2: SF = 8, BW = 125 kHz, BitRate = 3125 bps > - 3: SF = 7, BW = 125 kHz, BitRate = 5470 bps > > Valid TxPower > > I believe its expressed in dB > 0 to 20 (eu) ... maybe 0 to 14 (us) > > Let me know! > > — > You are receiving this because you are subscribed to this thread. > Reply to this email directly, view it on GitHub > <#12>, or mute the thread > <https://github.com/notifications/unsubscribe-auth/AGY1qi_fZCb8MGdZGCh_XLVdhLT3PAv7ks5vEJSegaJpZM4aFz_3> > . >