{
  "format": "evn-blocks",
  "version": 3,
  "title": "Bluetooth: every block",
  "needs": "the Bluetooth module on serial port 2, and a phone (Android) or PC paired with it (PIN 1234) running a Bluetooth serial terminal app that ends each line it sends with a newline",
  "description": "Every Bluetooth block once: the board sends its battery voltage to the phone, then for 30 seconds answers each line the phone sends, until the phone sends \"stop\". Switch the board on without holding the module's button (held, the set-up reprograms the module's name, speed and role), and do not have the board's REPL on this module: while it runs over the module it takes what the phone sends. The Board view's broadcast button puts it there by writing bt.repl(True) into boot.py; take that line out of boot.py and reset the board.",
  "workspace": {
    "blocks": {
      "languageVersion": 0,
      "blocks": [
        {
          "type": "evn_setup_start",
          "x": 30,
          "y": 30,
          "next": {
            "block": {
              "type": "evn_bluetooth_setup",
              "fields": {
                "PORT": "2"
              }
            }
          }
        },
        {
          "type": "evn_program_start",
          "x": 30,
          "y": 115,
          "next": {
            "block": {
              "type": "evn_comment",
              "fields": {
                "TEXT": "send: one line of text to the phone (the board sends every character; with no phone connected the module drops them)"
              },
              "next": {
                "block": {
                  "type": "evn_bluetooth_send",
                  "fields": {
                    "PORT": "2"
                  },
                  "inputs": {
                    "TEXT": {
                      "shadow": {
                        "type": "text",
                        "fields": {
                          "TEXT": "EVN ready. Battery in mV:"
                        }
                      }
                    }
                  },
                  "next": {
                    "block": {
                      "type": "evn_bluetooth_send",
                      "fields": {
                        "PORT": "2"
                      },
                      "inputs": {
                        "TEXT": {
                          "block": {
                            "type": "evn_battery_voltage"
                          }
                        }
                      },
                      "next": {
                        "block": {
                          "type": "evn_bluetooth_send",
                          "fields": {
                            "PORT": "2"
                          },
                          "inputs": {
                            "TEXT": {
                              "shadow": {
                                "type": "text",
                                "fields": {
                                  "TEXT": "Send me lines; send stop to end."
                                }
                              }
                            }
                          },
                          "next": {
                            "block": {
                              "type": "evn_comment",
                              "fields": {
                                "TEXT": "60 times 500 ms: about 30 seconds"
                              },
                              "next": {
                                "block": {
                                  "type": "controls_repeat_ext",
                                  "inputs": {
                                    "TIMES": {
                                      "shadow": {
                                        "type": "math_number",
                                        "fields": {
                                          "NUM": 60
                                        }
                                      }
                                    },
                                    "DO": {
                                      "block": {
                                        "type": "evn_comment",
                                        "fields": {
                                          "TEXT": "has something arrived? then read one line (wait up to 1 s for its end)"
                                        },
                                        "next": {
                                          "block": {
                                            "type": "controls_if",
                                            "inputs": {
                                              "IF0": {
                                                "block": {
                                                  "type": "evn_bluetooth_any",
                                                  "fields": {
                                                    "PORT": "2"
                                                  }
                                                }
                                              },
                                              "DO0": {
                                                "block": {
                                                  "type": "variables_set",
                                                  "fields": {
                                                    "VAR": {
                                                      "id": "v_line"
                                                    }
                                                  },
                                                  "inputs": {
                                                    "VALUE": {
                                                      "block": {
                                                        "type": "evn_bluetooth_line",
                                                        "fields": {
                                                          "PORT": "2"
                                                        },
                                                        "inputs": {
                                                          "TIMEOUT": {
                                                            "shadow": {
                                                              "type": "math_number",
                                                              "fields": {
                                                                "NUM": 1000
                                                              }
                                                            }
                                                          }
                                                        }
                                                      }
                                                    }
                                                  },
                                                  "next": {
                                                    "block": {
                                                      "type": "controls_if",
                                                      "inputs": {
                                                        "IF0": {
                                                          "block": {
                                                            "type": "logic_compare",
                                                            "fields": {
                                                              "OP": "EQ"
                                                            },
                                                            "inputs": {
                                                              "A": {
                                                                "block": {
                                                                  "type": "variables_get",
                                                                  "fields": {
                                                                    "VAR": {
                                                                      "id": "v_line"
                                                                    }
                                                                  }
                                                                }
                                                              },
                                                              "B": {
                                                                "shadow": {
                                                                  "type": "text",
                                                                  "fields": {
                                                                    "TEXT": "stop"
                                                                  }
                                                                }
                                                              }
                                                            }
                                                          }
                                                        },
                                                        "DO0": {
                                                          "block": {
                                                            "type": "controls_flow_statements",
                                                            "fields": {
                                                              "FLOW": "BREAK"
                                                            }
                                                          }
                                                        }
                                                      },
                                                      "next": {
                                                        "block": {
                                                          "type": "text_print",
                                                          "inputs": {
                                                            "TEXT": {
                                                              "block": {
                                                                "type": "variables_get",
                                                                "fields": {
                                                                  "VAR": {
                                                                    "id": "v_line"
                                                                  }
                                                                }
                                                              }
                                                            }
                                                          },
                                                          "next": {
                                                            "block": {
                                                              "type": "evn_bluetooth_send",
                                                              "fields": {
                                                                "PORT": "2"
                                                              },
                                                              "inputs": {
                                                                "TEXT": {
                                                                  "block": {
                                                                    "type": "text_join",
                                                                    "inputs": {
                                                                      "ADD0": {
                                                                        "shadow": {
                                                                          "type": "text",
                                                                          "fields": {
                                                                            "TEXT": "got: "
                                                                          }
                                                                        }
                                                                      },
                                                                      "ADD1": {
                                                                        "block": {
                                                                          "type": "variables_get",
                                                                          "fields": {
                                                                            "VAR": {
                                                                              "id": "v_line"
                                                                            }
                                                                          }
                                                                        }
                                                                      }
                                                                    },
                                                                    "extraState": {
                                                                      "itemCount": 2
                                                                    }
                                                                  }
                                                                }
                                                              }
                                                            }
                                                          }
                                                        }
                                                      }
                                                    }
                                                  }
                                                }
                                              }
                                            },
                                            "next": {
                                              "block": {
                                                "type": "evn_wait",
                                                "inputs": {
                                                  "TIME": {
                                                    "shadow": {
                                                      "type": "math_number",
                                                      "fields": {
                                                        "NUM": 500
                                                      }
                                                    }
                                                  }
                                                }
                                              }
                                            }
                                          }
                                        }
                                      }
                                    }
                                  },
                                  "next": {
                                    "block": {
                                      "type": "evn_bluetooth_send",
                                      "fields": {
                                        "PORT": "2"
                                      },
                                      "inputs": {
                                        "TEXT": {
                                          "shadow": {
                                            "type": "text",
                                            "fields": {
                                              "TEXT": "bye"
                                            }
                                          }
                                        }
                                      }
                                    }
                                  }
                                }
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      ]
    },
    "variables": [
      {
        "name": "line",
        "id": "v_line"
      }
    ]
  }
}