got it to work with sleep, vcc, bme measurement and radio out

841-tinycore-micronucleus-blink/Blink.ino

@@ -0,0 +1,79 @@
+/* -*-c++-*-
+  Blink
+  Turns on an LED on for one second, then off for one second, repeatedly.
+  This example code is in the public domain.
+ */
+
+/*
+  ./hardware/ATTinyCore/avr/cores/tinymodern/core_pins.h
+  https://raw.githubusercontent.com/SpenceKonde/ATTinyCore/master/avr/extras/ATtiny_x41.png
+  Caution: reverse Pinout: PA3 => Pin 3
+
+  Nanite841 Pinout from above (ARDUINO pins in the middle):
+
+                button
+SDO/MISO PA5  5/5    4/6   PA6 SDI/MOSI
+     SCK PA4  4/6    3/7   PA7
+     CS  PA3  3/7    2/8   PB2
+     RX0 PA2  8/2   11/11  PB3
+     TX0 PA1  1/9    9/1   PB1
+         PA0 0/10   10/0   PB0
+         GND               VCC
+                 usb
+
+attiny841 pins => Arduino layout
+
+TOCC0   OC0B    pin 9 / PA1 - 841 pin 12    disabled
+TOCC1   OC0A    pin 8 / PA2 - 841 pin 11    disabled
+TOCC2   OC1B    pin 7 / PA3 - 841 pin 10
+TOCC3   OC0A    pin 6 / PA4 - 841 pin 9
+TOCC4   OC0B    pin 5 / PA5 - 841 pin 8
+TOCC5   OC1A    pin 4 / PA6 - 841 pin 7
+TOCC6   OC2B    pin 3 / PA7 - 841 pin 6
+TOCC7   OC2A    pin 2 / PB2 - 841 pin 5
+
+*/
+
+#include <avr/io.h>
+#include <util/delay.h>
+
+#define LED           10 // PB2
+
+#define SET_OUTPUT(pin) DDRB  |=  (1 << pin)
+#define SET_HIGH(pin)   PORTB |=  (1 << pin)
+#define SET_LOW(pin)    PORTB &= ~(1 << pin)
+
+void setup() {
+  uint8_t i = 0;
+  SET_OUTPUT(LED);
+  for (i=0; i<11; i++) {
+    pinMode(i, OUTPUT);
+  }
+  Serial.begin(115200);
+  Serial.println("init");
+}
+
+void loop_ard() {
+  uint8_t i = 0;
+  for (i=0; i<11; i++) {
+    Serial.print("Turning on pin: ");
+    Serial.println(i);
+    digitalWrite(i, HIGH);
+    delay(1000);
+    digitalWrite(i, LOW);
+    delay(1000);
+  }
+  delay(100);
+}
+
+void loop_man() {
+  SET_HIGH(LED);
+  delay(1000);
+  SET_LOW(LED);
+  delay(100);
+}
+
+
+void loop() {
+  loop_man();
+}

841-tinycore-micronucleus-blink/Makefile

@@ -0,0 +1,56 @@
+# Arduino Make file. Refer to https://github.com/sudar/Arduino-Makefile
+
+# attiny841:
+#   BOARD_TAG          = attinyx41
+#   BOARD_SUB          = 841
+# attiny861:
+#   BOARD_TAG          = attinyx61
+#   BOARD_SUB          = 861
+# attiny85:
+#   BOARD_TAG          = attinyx5
+#   BOARD_SUB          = 85
+# attiny84:
+#   BOARD_TAG          = attinyx4
+#   BOARD_SUB          = 84
+
+ARDUINO_VERSION = 10810
+
+PROJECT_DIR              = $(shell pwd)
+BOARD_TAG                = attinyx41
+BOARD_SUB                = 841
+ARDUINO_DIR              = /usr/local/arduino
+ARDMK_DIR                = /usr/local/arduino/Arduino-Makefile
+MONITOR_PORT             = /dev/ttyACM0
+ISP_PORT                 = /dev/ttyACM0
+AVRDUDE                  = /usr/bin/avrdude
+ARDUINO_LIBS             = 
+ARDUINO_SKETCHBOOK       = .
+
+# mk stuff
+ALTERNATE_CORE           = ATTinyCore
+F_CPU                    = 8000000L
+MONITOR_BAUDRATE         = 115200
+AVRDUDE_ARD_PROGRAMMER   = stk500v2
+AVRDUDE_ARD_BAUDRATE     = 9600
+AVR_TOOLS_DIR            = /usr/local/avr
+AVRDUDE_CONF             = /usr/local/etc/avrdude.conf
+
+# Micronucleus
+MNINST                   = sudo micronucleus
+
+# compiler stuff
+CFLAGS_STD               = -std=gnu11
+CXXFLAGS_STD             = -std=gnu++11
+CXXFLAGS                += -pedantic -Wall -Wextra
+CURRENT_DIR              = $(shell pwd)
+
+# keep this!
+include $(ARDMK_DIR)/Arduino.mk
+
+# install using micronucleus
+install: $(TARGET_HEX) verify_size
+	@echo "########### Press RESET on the Nanite! ##############"
+	$(MNINST) $(TARGET_HEX)
+
+console:
+	screen /dev/ttyUSB0 115200

841-tinycore-micronucleus-blink/hardware

@@ -0,0 +1 @@
+/usr/local/arduino/hardware

841-tinycore-micronucleus-vcc-sleepmode-bme280-radio-header-test/Makefile

@@ -22,7 +22,7 @@ ARDUINO_DIR              = /usr/local/arduino
 ARDMK_DIR                = /usr/local/arduino/Arduino-Makefile
 MONITOR_PORT             = /dev/ttyACM0
 ISP_PORT                 = /dev/ttyACM0
-AVRDUDE                  = /usr/local/bin/avrdude
+AVRDUDE                  = /usr/bin/avrdude
 ARDUINO_LIBS             = SPI TinyBME280 RFTransmitter
 ARDUINO_SKETCHBOOK       = .
 
@@ -51,3 +51,6 @@ include $(ARDMK_DIR)/Arduino.mk
 install: $(TARGET_HEX) verify_size
 	@echo "########### Press RESET on the Nanite! ##############"
 	$(MNINST) $(TARGET_HEX)
+
+console:
+	screen /dev/ttyUSB0 115200

841-tinycore-micronucleus-vcc-sleepmode-bme280-radio-header-test/SensorSerial.ino

@@ -6,20 +6,32 @@
 
 /*
   ./hardware/ATTinyCore/avr/cores/tinymodern/core_pins.h
+  https://raw.githubusercontent.com/SpenceKonde/ATTinyCore/master/avr/extras/ATtiny_x41.png
   Caution: reverse Pinout: PA3 => Pin 3
 
-  Nanite841 Pinout from above:
+  Nanite841 Pinout from above (ARDUINO pins in the middle):
 
                 button
-SDO/MISO PA5          PA6 SDI/MOSI
-     SCK PA4          PA7
-     CS  PA3          PB2
-     RX0 PA2          PB2
-     TX0 PA1          PB1
-         PA0          PB0
+SDO/MISO PA5  5/5    4/6   PA6 SDI/MOSI
+     SCK PA4  4/6    3/7   PA7
+     CS  PA3  3/7    2/8   PB2
+     RX0 PA2  8/2   11/11  PB3
+     TX0 PA1  1/9    9/1   PB1
+         PA0 0/10   10/0   PB0
          GND               VCC
                  usb
 
+attiny841 pins => Arduino layout
+
+TOCC0   OC0B    pin 9 / PA1 - 841 pin 12    disabled
+TOCC1   OC0A    pin 8 / PA2 - 841 pin 11    disabled
+TOCC2   OC1B    pin 7 / PA3 - 841 pin 10
+TOCC3   OC0A    pin 6 / PA4 - 841 pin 9
+TOCC4   OC0B    pin 5 / PA5 - 841 pin 8
+TOCC5   OC1A    pin 4 / PA6 - 841 pin 7
+TOCC6   OC2B    pin 3 / PA7 - 841 pin 6
+TOCC7   OC2A    pin 2 / PB2 - 841 pin 5
+
   Bosch BME280 Breakout from above pin header left:
 
     VCC
@@ -44,19 +56,19 @@ SDO/MISO PA5          PA6 SDI/MOSI
 #include <RFTransmitter.h>
 
 #define NODE_ID       1
-#define OUTPUT_PIN    7
+#define SENDER_PIN    10 // == PB0 // ARDUINO PIN#
 #define LED           2  // LED_BUILTIN  // PORTB2
 #define CS            3
 #define DELAY         5000
 #define WDTREPEATS    3
 
 static tiny::BME280 sensor;
-RFTransmitter transmitter(OUTPUT_PIN, NODE_ID);
+RFTransmitter transmitter(SENDER_PIN, NODE_ID);
 const long InternalReferenceVoltage = 1083L;
 
 #define SET_OUTPUT(pin) DDRB  |=  (1 << pin)
-#define SET_HIGH(pin)   PORTB |=  (1 << pin)
-#define SET_LOW(pin)    PORTB &= ~(1 << pin)
+#define SET_LOW(pin)    PORTB |=  (1 << pin)
+#define SET_HIGH(pin)   PORTB &= ~(1 << pin)
 
 typedef struct _measurements_t {
   uint32_t pres;
@@ -81,12 +93,15 @@ void print_measurements() {
   measurements_t ms;
   byte sendms[sizeof(measurements_t)];
 
+  Serial.println("-- Enter Measure");
   SET_LOW(LED);
 
+  Serial.println("-- Read measurementes");
   ms.temp     = sensor.readFixedTempC();
   ms.humidity = sensor.readFixedHumidity();
   ms.pres     = sensor.readFixedPressure();
 
+  Serial.println("-- Read VCC");
   adc_enable();
   adc_start();
   ms.vcc = adc_get_adcw();
@@ -140,17 +155,33 @@ void setup() {
   sleep_setup();
 }
 
-void loop() {
+void loop_nosleep() {
   uint8_t i;
+  
   print_measurements();
+
+  delay(100);
+}
+
+void loop_sleep() {
+  uint8_t i;
+  Serial.println("-- ENTER LOOP");
+  
+  print_measurements();
+  //delay(DELAY);
+
   for(i=0; i<WDTREPEATS; i++) {
     delay(DELAY);
     Serial.print("----- ENTER SLEEP: ");
     Serial.println(i);
-    sleep_enter();
+    sleep_enter_keep_spi();
     Serial.println("----- LEAVE SLEEP");
   }
-  Serial.println("-- DONE");
+  Serial.println("-- AWAKE");
+}
+
+void loop() {
+  loop_sleep();
 }
 
 sleep_vect();

841-tinycore-micronucleus-vcc-sleepmode-header-test/SensorSerial.ino

@@ -41,7 +41,7 @@ SDO/MISO PA5          PA6 SDI/MOSI
 #define LED           2 //LED_BUILTIN  // PORTB2
 #define CS            3
 #define DELAY         5000
-#define WDTREPEATS    10
+#define WDTREPEATS    10 // results in 8s x 10 times == 80 seconds sleep
 
 #define SET_OUTPUT(pin) DDRB  |=  (1 << pin)
 #define SET_HIGH(pin)   PORTB |=  (1 << pin)

mylibs/841sleep.h

@@ -55,6 +55,21 @@
   delay(10);           \
   SPCR = (1<<SPE)
 
+// go into sleep mode, keep SPI running
+// disable ADC
+// wait a little for the last serial out (if any) to flush
+// set all bits in power reduction register to one (shutdown everything)
+// actually sleep
+// wake up after WDT timeout
+// wait a little
+#define sleep_enter_keep_spi()                           \
+  adc_disable();       \
+  delay(10);           \                       
+  PRR = 0xFF;          \
+  sleep_mode();        \
+  PRR = 0x00;          \
+  delay(10);
+
 // nothing extra to do on wake up, just wake up
 #define sleep_vect() ISR(WDT_vect){}