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limit max power on rf95 to 17 (rather than 20, because 20 can...

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burn up parts if you exceed 1% duty cycle)
This commit is contained in:
geeksville 2020-05-02 19:52:37 -07:00
parent 80268ea56a
commit 79c61cf0e0
1 changed files with 10 additions and 7 deletions
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17
src/mesh/RF95Interface.cpp
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@ -3,6 +3,9 @@
#include "RadioLibRF95.h" #include "RadioLibRF95.h"
#include <configuration.h> #include <configuration.h>
#define MAX_POWER 17
// if we use 20 we are limited to 1% duty cycle or hw might overheat. For continuous operation set a limit of 17
RF95Interface::RF95Interface(RADIOLIB_PIN_TYPE cs, RADIOLIB_PIN_TYPE irq, RADIOLIB_PIN_TYPE rst, SPIClass &spi) RF95Interface::RF95Interface(RADIOLIB_PIN_TYPE cs, RADIOLIB_PIN_TYPE irq, RADIOLIB_PIN_TYPE rst, SPIClass &spi)
: RadioLibInterface(cs, irq, rst, 0, spi) : RadioLibInterface(cs, irq, rst, 0, spi)
{ {
@ -15,10 +18,10 @@ RF95Interface::RF95Interface(RADIOLIB_PIN_TYPE cs, RADIOLIB_PIN_TYPE irq, RADIOL
bool RF95Interface::init() bool RF95Interface::init()
{ {
RadioLibInterface::init(); RadioLibInterface::init();
applyModemConfig(); applyModemConfig();
if (power > 20) // This chip has lower power limits than some if (power > MAX_POWER) // This chip has lower power limits than some
power = 20; power = MAX_POWER;
iface = lora = new RadioLibRF95(&module); iface = lora = new RadioLibRF95(&module);
int res = lora->begin(freq, bw, sf, cr, syncWord, power, currentLimit, preambleLength); int res = lora->begin(freq, bw, sf, cr, syncWord, power, currentLimit, preambleLength);
@ -27,7 +30,7 @@ bool RF95Interface::init()
if (res == ERR_NONE) if (res == ERR_NONE)
res = lora->setCRC(SX126X_LORA_CRC_ON); res = lora->setCRC(SX126X_LORA_CRC_ON);
if (res == ERR_NONE) if (res == ERR_NONE)
startReceive(); // start receiving startReceive(); // start receiving
return res == ERR_NONE; return res == ERR_NONE;
@ -67,8 +70,8 @@ bool RF95Interface::reconfigure()
err = lora->setFrequency(freq); err = lora->setFrequency(freq);
assert(err == ERR_NONE); assert(err == ERR_NONE);
if (power > 20) // This chip has lower power limits than some if (power > MAX_POWER) // This chip has lower power limits than some
power = 20; power = MAX_POWER;
err = lora->setOutputPower(power); err = lora->setOutputPower(power);
assert(err == ERR_NONE); assert(err == ERR_NONE);
@ -120,4 +123,4 @@ bool RF95Interface::sleep()
lora->sleep(); lora->sleep();
return true; return true;
} }