[RC232] Why is RC1280HP-RC232 shown as ‘Not recommended for new designs’? How much longer will be in production?
[RC232] When the module is receiving data from the air, is it possible to send data from the host on the UART RXD ?
[RC232] When the MAC layer has a packet to send, it will use a carrier-sense-multiple-access (CSMA) protocol to determine if another module is already transmitting. If another module is transmitting, the module will receive that data before attempting to transmit its data again. If, during this process, the UART receive buffer gets full, the CTS line will go high to prevent the host UART from over-running the receive buffer. The CSMA mechanism introduces a variable delay to the transmission channel. This delay is the sum of a random period and a weighted period that is dependent on the number of times that the module has tried and failed to acquire the channel. For applications that guarantee that only one module will be transmitting at any given time, the CSMA mechanism can be turned off to avoid this delay.
[RC232] When I set the transmit power to the smallest value, is only the transmit power reduced or also the receive power?
[RC232] When I connect RXEN and TXEN to VDD, instead of leaving open, the current consumption increases to 20, mA. When I send a character to the module over RS232, the current appears to be 134mA.
[RC232] When CRC is enabled does the module try to resend the message if CRC does not match or is the message dropped?
[RC232] When a packet is transmitted from one module to another, what is the receiving module going to output on its UART? The exact number of bytes sent? Or will it add some extra information like “Byte count, sender address or CRC”?
[RC232] What is the range of the module RC1180-RC232 868 MHz? Can this module communicate over a distance of 500m?
[RC232] What is the expected range of the RC1190-RC232 module when implemented with a reasonable antenna solution?
[RC232] We’d like one of the LED outputs to blink on radio transmission, and the other LED output to blink on radio receive. It appears they are currently unused?
[RC232] we use your Radiocrafts Modules (1180-RC232) and have problems with the configuration. Could you send us an example in C how to handle this?
[RC232] We use 2 Radiocrafts devices on the same board, do I need an extra EMI cage as shielding to avoid any EMI issues?
[RC232] We are trying to configure our modems RC2500HP 201545H to use them at a data rate of 250kbit/s, following the datasheet rev 1.22. However the communication fails at this RF rate. Back to 100 kbit/s the communication is works again.
[RC232] We are in the process of evaluating the RC1240, The only thing I’m not sure about at the moment is how to implement a busy check before transmitting
[RC232] Using a switching power supply from 12V to 3.3V, switching at 300 kHz, and a 1% ripple output; do I need extra filtering?
[RC232] They have 10’s of sensors that assembled in a system, would like to consider to have low power RF units that can work in noisy and industrial zone. The system length could be <10m. A mesh is also something they could consider, please advise if you have experience in such application field
[RC232] The receive LED on the eval kit was flashing but no data sent to the PC. Does this indicate a signal was detected but failed on CRC ?
[RC232] The problem is when I exit config mode (X command) and the command does not work. How can I know that?
[RC232] The MAX input power is 10dBm. What appen if the module receive a greater power? Just the signal make worse or the module could be damaged? In case could you suggest a protection circuit?
[RC232] The evaluation it RCxxxxHPDK-USB have a config. button – does it means that when try to configure the device need to assert it LOW ? Do you have a programmable version that can be used to assert the config pin to LOW when needed ?
[RC232] The Datasheet for RC2500HP-RC232, shows 2 pins: PA_EN & LNA_EN, are they to be used or should I disregard them?
[RC232] The data packet size requirement is for a fixed 24Byte packet, can the radio be configured for the intended packet size, in order to minimize the ‘on the air’ requirement.
[RC232] Should these boards transmit and receive data to each other out of the box? Or, must their addresses and channels be configured first?
[RC232] Should RC1140 be better than RC1180for this application because attenuation on water will be lower a at 433 ?
[RC232] Should RC1140 be better than RC1180for this application because attenuation on water will be lower a at 433 ?
[RC232] Regarding the RC1740HP-RC232, when referring to the region “worldwide”, what does that mean? What certification is available for “worldwide”?
[RC232] RC1290 – What is the FCC number and the emission designator? RC110HP – What is the emission designator?
[RC232] Question regarding RC232 in Star mode (many to one). If more than node will transmit at same to central point – will RC232 protocol queue data somehow, or there will be collision or data will be lost?
[RC232] Please confirm if packet_length should be configured to total number of bytes including overhead (26 in my case) or only effective payload (15 in my case)
[RC232] Maybe you have some documents or test reports about the influence of the data rate to the range in the same system?
[RC232] Is there any possibility to replace the 1780HP by a module certified for North America and with the same (or closed) range?
[RC232] Is the RC11XXHP-RC232 series pin compatible with the low cost family RC11XX? Is there a possibility that the additional pads on the product PCB n31 to n 42, short or connect to a trace or via under the RC11XX module ?
[RC232] Is the internal configuration (internal diode, internal pull-ups, etc) of RC17XX series the same of RC1240 on same pin? I.e, when pin of RC17XX is (functional) the same of RC1240, the internal configuration is the same too? If there are differt configuration, could you indicate it?
[RC232] In your schematic i can see four connections on the RF Antenna port, A66 0 Ohm Resistor to a LGA Pad, L-Bead to Connector P6, Resistor to UFL Connector P3 ,Resistor to hole. Which of them are necessary for the antenna?
[RC232] In the Datasheet of the RC11XXHP-RC232 Module it is written that the Module is “Designed for EX compliance”. What does this mean?
[RC232] In order to save costs, the customer need to make a only one board that can accept the different devices: RC1240 or RC1701 / RC1701HP or RC1740 / RC1740HP or RC1780 / RC1780HP or RC11x. Could you supply a final schematic for all pins (series resistors, pull-up, diode etc.)?
[RC232] In a point to multi point scenario, (host with clients) can the host see the received signal levels of the clients when they transmit data?
[RC232] If more than node will transmit at same to central point – will RC232 protocol queue data somehow, or there will be collision or data will be lost? “
[RC232] I’ve noticed the label FCC pending on the RC1190HP. Could you please confirm is FCC approved?
[RC232] I’m not currently using flow control, and am having an issue in correctly identifying the start of each 64 byte packet. My understanding of CTR/RTS is that they wouldn’t help in this? Is there a signal that shows the start of each packet?
[RC232] I’d like to receive the thermal profiling for the reflow oven regarding your RC1180 and RC1701 modules. I’m looking in your website, but I can’t find this info.
[RC232] I want to know if you information about the transmission distance regarding the power RF level ?
[RC232] I use a switching DC/DC regulator, will the ripple have a negative effect on the VCO in the radio?
[RC232] I see that the RF Data rate is configurable, but cannot see anything regarding the UART Baudrate, I presume this is also configurable ?
[RC232] I get no more prompt when asserting/deasserting Config line. I use the M command in order to modify different settings.
[RC232] I discover that when I start the system, CONFIG pin is low and UART is not initialised. I think it is a mistake and can create some problems. Can you comfirm?
[RC232] I can’t find out in documentation, how to change RF data rate in volatile memory only in RC1780HP module. In “RC232 Embedded RF Protocol User Manual v1.5” there is no such command specified
[RC232] For EN 300 220, which “receiver category” (1, 1.5, 2 or 3) has been used for conformity assessment of RC1240?
[RC232] For a packet size of 24 Bytes, could you provide an estimate of the ‘on air’ time at data rates of 50 and 100 Kpbs?
[RC232] For a limited space – is there any antenna that you could recommend? Preferably not longer than 3 cm.
[RC232] Each slave boat will have a bit rate of 1Kbps to the master node, the signal range must be till 2km (line of sight). We are considering using RC17xxHP-RC232 modules to communicate with master boat and slaves. It’s possible with this device to create a multipoint network (one master, many slaves)?
[RC232] Do you use a CCA/MA that’s in error or drifts like RSSI? What is your proposed solution for this issue?
[RC232] Do you consider that the 2.4Ghz antenna alone allows to reject the GSM signal to prevent damage on the RC2500 ?
[RC232] Could you send details on how broadcast and unicast routing works? Is a mesh network or hopping supported, if so to what size?
[RC232] Can you please confirm the width of the PCB trace from the RF pin of the RC1140-RC232 to the copper pad we use to connect a wire antenna in order to achieve 50 ohms Z0? We’ve also done the layout so the power plane has a cutout below the microstrip.
[RC232] Can we have the power consumption on RX mode (standby mode, waiting for any RX to come) be as low as 2-3 mA? (On the spec it is 24mA)
[RC232] Can a software update / bootloader command be added? We need something that allows us to update the RC232 module in the field via the UART.
[RC232] Are the Settings made during Configuration persistent, or do these settings need to be made each time the device is powered on ?
[RC232] Are all the connections on P5 necessary for a Microcontroller? Or are the pins Config/TXD/RXD/GND sufficient?
[RC232] Actually we want to change the SID of a gateway which is already installed. How to change the SID?
[RC232] According to your datasheet, the maximal RF rate is 4.8 kbps. If I use more, the BW will be greater than 12.5 kHz and it will not be possible to have 8 channels in the band.Can you comfirm this fact?
[RC232] 2. If the module is powered down when not required for RX/TX, what is the power up time before it can be used to transmit? – is there failsafe way which indicates WHEN the module is ready to transmit, or determine this by checking something?
[RC232] 1. How does the RC1180-RC232 react as the supply voltage reduces below the minimum operating voltage and below – the system is powered by a Solar cell secondary cell to hold charge short to medium term. It is possible the secondary cell will start to discharge beyond the requirement for operation – does the module need to be unpowered to protect it from brown-out situations.
[RC232] “When I connect to the development board using your software (“”RC232 Configuration and Communication Tool””), everything works fine. But when I connect to the development board from inside my own application for the first time each day (e.g. in the morning when the dev. boards have been powered down for a couple of hours), it only sends 0x00s via the air interface, no matter what i want to send, everything is zero. When I then connect to the board once with your software, everything works fine again and also my application afterwards works fine, and I can send everything correctly again. But I have to do this every morning again. Maybe you have any ideas what the reason for this is or what I could do to fix this problem? “
[RC232] “We use the RC1280HP would like to know if an LNA could help improving the Rx signal of the RC1280HP. Could you give us some advice on that? “
[RC232] “We need to cover a LOS of up to 1Km While having the antenna approx only up to 1m above ground level. Can this be achieved with RC2500-RC232 with 1dBm output? “
[RC232] “We enable the RTS/CTS option in the DK and we send message longer than 128 bytes (the max buffer size) so we need the CTS to separated the massage. We test this with scope: 1. In the CTS we didn’t see change (I suppose all 128 bytes it needs to change) 2. Also in the Tx/Rx I suppose to see a break in the 128 bytes, but it takes all the massage 3. When I try connect this module to PC, only message shorter than 1024 bytes success to send “
[RC232] “We claim in our documentation 500-600 meters LOS. It looks like we are half of expected range What are your explanations regarding this performance difference; “
[RC232] “We are drawing a new board which used your module RC1180. We are in a final phase. For the interface with the our µC, we connected only the pins : – RxD & TxD for module configuration and normal use for communication – Pin Reset, Pin 19, Pin 20 : for future programming (case of firmware update) Also, we connected the pin Vcc and ground with recommandations described in your data sheet. I would like to know, if we can use functions of test carrier transmit, modulation transmit and permanent receipt with only the pins RxD and TxD (RTS, CTS and config not connected to our µC but available on test pads). Do you have a procedure to put this module in test mode. For a firmware upgrade, could you confirm us that we need only Pin 19, 20 and reset ? “
[RC232] “We are currently evaluating your RF Modules RC1180-RC232 and RC1180HP- RC232. I stumpled upon two important questions: Are those two modules interchangeable? Can a RC1180 communicate with a RC1180HP and vice-versa? Are they pin- and software-compatible? “
[RC232] “we are building an application with one master boat, which communicates with 150 slaves boats (obviously in open sea). Each slave boat will have a bit rate of 1Kbps to the master boat, the signal range must be till 2km. We are considering using RC17xxHP-RC232 modules to communicate with master boat and slaves. Our questions are: It will be the RC1780HP-RC232 module suitable for this application, or you propose some other module? It’s possible with this device to create a multipoint network (one master, many slaves)? Does your modules have frequency hopping function? “
[RC232] “The data rates for the high speed module RC1180HP is more suitable for our needs, but we need to have the possibility to increase the range with a high gain antenna or any kind of amplifier, could that be possible? “
[RC232] “Please confirm that: RC1180/1140 and 1190 have exactly the same foot print/pin out… The goal being to have only one PCB and the same print for the 3 modules. “
[RC232] “Our company currently use the modules 1280HP of 500mW. We need to amplify more, is there the possibility of more than 500mW with an external amplifier? “
[RC232] “Non-volatile memory contains the module name and version (e.g. “”RC1240,2.60,2.34″”) starting at offset 0x3C. The manuals don’t mention it, is this string present in all modules at the same address, and can we use it to identify the module? “
[RC232] “Is it possible to setup a maximum length for received packages in RC232? I am aware of TX packages can be configured to have a maximum package length. By being able to configure the maximum length of received packages, I can have a smaller rx buffer size to store it in while processing it. “
[RC232] “i have some questions for RC1701HP-RC232. Need the “tx” pin a levelshifter or driver-ic (our previous experience with RC1280 was a f—ing 100KR impedance!!!) ? Are on the “tx”, “rx” and “cts” pins resistors in series? Can I connect “tx”,”rx” and “cts” directly to a MCU (XMEGA @ 3,3V)? “
[RC232] “I have problem to wake up RS1240 from sleep mode, in fact I can’t wake it up at all. According to documentation, config pin should be asserted when going to sleep mode, and then positive edge should wake ip module This is code I use: Config Portd.3 = Output : Modem_config Alias Portd.3 Modem_config = 1 ‘ ———— PUT MODEM IN SLEEP MODE Modem_config = 0 ‘ Assert Config pin Waitms 5 ‘ MAX Time from CONFIG pin is set low until prompt (“”>””) Print “”Z””; ‘ Goto SLEEP mode . . . Sub Send_packet Modem_config = 1 ‘ Wake up form SLEEP mode Waitms 60 ‘ Wait 60 ms to get out from sleep mode Print “”X””; ‘ Goto idle mode Led_tx = 1 Printbin Paket_start Printbin Data_packet Led_tx = 0 Modem_config = 0 ‘ Assert Config PIN Waitms 5 ‘ MAX Time from CONFIG pin is set low until prompt (“”>””) Print “”Z””; ‘ SLEEP mode End Sub But, module stuck in sleep mode, and dont send enything. When I comment all lines regarding sleep mode, module work fine. Where I’m wrong? I should deliver device this week, and this is only problem I have to resolve. “
[RC232] “I have a question for the RC2500HP-RC232, which seems not to be listed in the datasheet. We have the RC2500HP-RC232 connected to a supply voltage of 3.3v. Which voltage will the uart tx output from the RC2500HP-RC232 be? We found a other note on your site, that suggested that it would only have 2.7v on the uart tx pin, even though the module was supplied with 3.3v. “
[RC232] “I bought the RC1180RC232DK (USB). Need quickly connect both modules to RS232 lines, to made a wireless path between angle-sensor and test PC. The actuator should only send each packet (packet of 4×8 bit angle values) to connected PC. Always active after power-up. Is enough to disconnect the jumpers from/to Rx/Tx lines and connect the module direct to RS232 level shifter? (inverted?) “
[RC232] “For a packet size of 24 Bytes, could you provide an estimate of the ‘on air’ time at data rates of 50 and 100 Kpbs. PilotAware is a co-operative broadcast system, and hence the minimum amount of time on the air is crucial. “
