commit d1582cabd01cc234a89fad2e7dc3a417ee17de63
Author: Piotr Dobrowolski <admin@tastycode.pl>
Date:   Sun Feb 24 08:10:26 2019 +0100

    Initial commit

diff --git a/modbus_test.py b/modbus_test.py
new file mode 100644
index 0000000..a3a4d7f
--- /dev/null
+++ b/modbus_test.py
@@ -0,0 +1,21 @@
+#!/usr/bin/env python
+from pymodbus.client.sync import ModbusSerialClient
+import time
+
+import logging
+logging.basicConfig()
+log = logging.getLogger()
+log.setLevel(logging.DEBUG)
+
+client = ModbusSerialClient(method='rtu', port='/dev/serial/by-id/usb-FTDI_TTL232R_FTF48YOZ-if00-port0', timeout=0.02, baudrate=115200)
+client.connect()
+time.sleep(1)
+log.debug("Read input registers")
+start = time.time()
+found = 0
+for n in range(256):
+    rr = client.read_input_registers(1, 1, unit=n)
+    found += not rr.isError()
+    print(rr)
+    print(time.time() - start, found)
+client.close()
diff --git a/notes.md b/notes.md
new file mode 100644
index 0000000..d03fbcc
--- /dev/null
+++ b/notes.md
@@ -0,0 +1,12 @@
+Fails:
+* r1 was supposed to be a pullup
+* programming/icsp header is broken
+
+
+
+Prog
+====
+* avrdude -c avrisp -b 19200 -p m328p -P /dev/ttyUSB5 -vvv
+
+* avrdude -pm328pb -cstk500v1 -P/dev/ttyUSB5 -b19200 -e -Uefuse:w:0xf5:m -Uhfuse:w:0xDE:m -Ulfuse:w:0xFF:m
+* avrdude -pm328pb -cstk500v1 -P/dev/ttyUSB5 -b19200 -Uflash:w:/home/informatic/.arduino15/packages/arduino/hardware/avr/1.6.8/bootloaders/optiboot/optiboot_atmega328.hex:i -Ulock:w:0x0F:m
diff --git a/software/.gitignore b/software/.gitignore
new file mode 100644
index 0000000..6c69f4c
--- /dev/null
+++ b/software/.gitignore
@@ -0,0 +1,2 @@
+.pioenvs
+.piolibdeps
diff --git a/software/lib/readme.txt b/software/lib/readme.txt
new file mode 100644
index 0000000..dbadc3d
--- /dev/null
+++ b/software/lib/readme.txt
@@ -0,0 +1,36 @@
+
+This directory is intended for the project specific (private) libraries.
+PlatformIO will compile them to static libraries and link to executable file.
+
+The source code of each library should be placed in separate directory, like
+"lib/private_lib/[here are source files]".
+
+For example, see how can be organized `Foo` and `Bar` libraries:
+
+|--lib
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |- readme.txt --> THIS FILE
+|- platformio.ini
+|--src
+   |- main.c
+
+Then in `src/main.c` you should use:
+
+#include <Foo.h>
+#include <Bar.h>
+
+// rest H/C/CPP code
+
+PlatformIO will find your libraries automatically, configure preprocessor's
+include paths and build them.
+
+More information about PlatformIO Library Dependency Finder
+- http://docs.platformio.org/page/librarymanager/ldf.html
diff --git a/software/platformio.ini b/software/platformio.ini
new file mode 100644
index 0000000..4479d8e
--- /dev/null
+++ b/software/platformio.ini
@@ -0,0 +1,21 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; http://docs.platformio.org/page/projectconf.html
+
+[env:uno]
+platform = atmelavr
+board = uno
+framework = arduino
+monitor_port = /dev/serial/by-id/usb-FTDI_TTL232R_FTF48YOZ-if00-port0
+upload_port = /dev/serial/by-id/usb-FTDI_TTL232R_FTF48YOZ-if00-port0
+targets = upload, monitor
+monitor_baud = 115200
+
+lib_deps =
+    https://github.com/yaacov/ArduinoModbusSlave/archive/03e0182795fee5e7025c14c5817cac835f760eae.zip
diff --git a/software/src/main.ino b/software/src/main.ino
new file mode 100644
index 0000000..6ff16bd
--- /dev/null
+++ b/software/src/main.ino
@@ -0,0 +1,35 @@
+#include <ModbusSlave.h>
+#include <EEPROM.h>
+
+// explicitly set stream to use the Serial serialport
+Modbus modbus(Serial, 1, 3); // stream = Serial, slave id = 1, rs485 control-pin = 8
+
+void setup() {
+    pinMode(13, OUTPUT);
+
+    Serial.begin(115200);
+    Serial.print("Initializing! ");
+    for (int i = 0; i < 16; i++) {
+        Serial.print(EEPROM.read(1));
+        Serial.print(" ");
+    }
+    Serial.println();
+
+    modbus.cbVector[CB_READ_INPUT_REGISTERS] = ReadAnalogIn;
+    modbus.begin(115200);
+}
+
+void loop() {
+	modbus.poll();
+
+    digitalWrite(13, (millis() / 200) % 2);
+}
+
+// Handel Read Input Registers (FC=04)
+uint8_t ReadAnalogIn(uint8_t fc, uint16_t address, uint16_t length) {
+	// write registers into the answer buffer
+	for (int i = 0; i < length; i++) {
+		modbus.writeRegisterToBuffer(i, analogRead(address + i));
+	}
+	return STATUS_OK;
+}