<![CDATA[Driving dozens of sensors and relays on Core2 plus a temperature sensor]]>I am creating an exciting application where I need to read many sensors and also drive many relays. Also I need a Temperature sensor. and all on Core2.
Now I succeeded to run PAHUB together with ExtIO2 so I can read many sensors and drive many relays...which is great!
However, when I want to include a DS18B20 temperature sensor, I need the OneWire library. But when I add this library it throws errors below.
What do I need to do to make it work?

============================
#include <M5Core2.h>
#include "ClosedCube_TCA9548A.h"

#include "UNIT_4RELAY.h"
UNIT_4RELAY relay;

#include "M5_EXTIO2.h"
M5_EXTIO2 extio;
#include <OneWire.h>

========================================================================
errors after compiling:

In file included from /home/pi/Arduino/PAHUB_4RELAY/PaHUB_4RELAY/PaHUB_4RELAY.ino:19:
/home/pi/Arduino/libraries/UNIT_4RELAY/src/UNIT_4RELAY.h:6:14: error: expected ',' or '...' before numeric constant
#define addr 0X26
^~~~
/home/pi/Arduino/libraries/OneWire/OneWire.h:134:40: note: in expansion of macro 'addr'
static uint8_t crc8(const uint8_t *addr, uint8_t len);
^~~~

]]>https://community.m5stack.com/topic/4714/driving-dozens-of-sensors-and-relays-on-core2-plus-a-temperature-sensorRSS for NodeWed, 29 Apr 2026 05:07:08 GMTSun, 16 Oct 2022 07:10:41 GMT60<![CDATA[Reply to Driving dozens of sensors and relays on Core2 plus a temperature sensor on Mon, 31 Oct 2022 16:15:09 GMT]]>for benefit of community, I could solve myself: changed Onewire.h line 134 from addr to addr2. And it works 🙂

]]>https://community.m5stack.com/post/19173https://community.m5stack.com/post/19173Mon, 31 Oct 2022 16:15:09 GMT